An unexcitable temperament.    From Wordnet, Princeton University. 

Adjective : Prima donnas had the reputation of being excitable and temperamental.    From Dictionary.com. 

The vice president was characteristically unexcitable.    From Wordnik.com.  [The Day That Changed America] Reference

Tyrone follows behind her, his usually unexcitable face animated.    From Wordnik.com.  [Cheer!] Reference

He was a fleshy man of about fifty, bald, pale skinned, and unexcitable.    From Wordnik.com.  [Blood Sports]

Set in the deep tan of his face, his blue eyes were calm and unexcitable.    From Wordnik.com.  [I Am Legend]

You enjoy the company of other people, but they find you unexcitable and depressing.    From Wordnik.com.  [Well, At Least I Have SOME Sort Of Skill!] Reference

Which are fundamental in the sense of being truly indivisible, unexcitable, basic, utterly elementary?.    From Wordnik.com.  [Higgs 101] Reference

Yet Senator Obama has turned out to be the very contrary of all this: thoughtful, unexcitable, soothing.    From Wordnik.com.  [Benjamin R. Barber: The Conservative Wins Again! Barack Obama by a Landslide] Reference

Obama was cool, diffident, above it all -- unflustered, unflappable, unexcitable and downright unexciting.    From Wordnik.com.  [Bob Ostertag: The Snooze Factor] Reference

Audiences, too, are staid and unexcitable, conspicuously older and more prosperous than the general populace.    From Wordnik.com.  [Music-Mad Month] Reference

It has been sad to see how hastily the antiwar movement gets excited about the utterly unexcitable Democrats.    From Wordnik.com.  [Changing Courses? John Murtha is no Knight in Shining Armor] Reference

That's why some otherwise unexcitable Mexicans are profoundly nervous about what the next six months may hold.    From Wordnik.com.  [Reform And The Revolution] Reference

In both cases, friends say, he is doing it with an unexcitable steadiness that is a product of his Hawaiian upbringing.    From Wordnik.com.  [The Early Word: Christmas Edition - The Caucus Blog - NYTimes.com] Reference

Tackling the perceived leadership crisis head on, the top leader—normally a sedate, unexcitable man—went on to give an amazing speech.    From Wordnik.com.  [Evolutionary Leadership] Reference

I asked the governor, who is an unexcitable lawyer of about 60, if “his people” — I phrased it this way — were seeking independence from Iraq.    From Wordnik.com.  [After Iraq] Reference

C.R. Laird, the red-haired, where he had any, unexcitable old doctor from Nebraska, who treated one hundred and fourteen wounded R.ssian soldiers in one night.    From Wordnik.com.  [The History of the American Expedition Fighting the Bolsheviki Campaigning in North Russia 1918-1919] Reference

Come to think of it, it was also up against Sky 1's very good police thriller Thorne, featuring rugged David Morrissey as unexcitable detective Tom, er … Thorne.    From Wordnik.com.  [TV Rewind: Single Father; The Pillars of the Earth; Jamie's 30-Minute Meals; Nigella Kitchen; Food: What Goes in Your Basket?] Reference

His naturally calm and unexcitable temperament had been still further disciplined by early habits of self-command, first as a scholar and subsequently as a soldier.    From Wordnik.com.  [The King's Warrant A Story of Old and New France] Reference

Albert was a man of fifty or more, with a large head, square German face and forehead, a large hazel eye, fixed and unexcitable, hair closely cut, and beard upon his chin and lip.    From Wordnik.com.  [Edmond Dantès] Reference

For Gandhi both communism and capitalism were morally unexcitable.    From Wordnik.com.  [Recently Uploaded Slideshows] Reference

Ordinarily the commandant of the fort was of a calm and unexcitable temperament.    From Wordnik.com.  [The Great War Syndicate] Reference

Another unexcitable voice, from the laconic flatlands of North Dakota - Senator Kent Conrad.    From Wordnik.com.  [ModerateVoters.org] Reference

She was a wide-awake and very unexcitable person, and I believe kept close hold on the psychic's right hand.    From Wordnik.com.  [The Shadow World] Reference

The wine in Rumford at any rate let loose his original nature, if it failed to unlock the animal in these other unexcitable Saxons.    From Wordnik.com.  [Celt and Saxon — Complete] Reference

Her voice, low and musical, her poise, and the tranquil and unexcitable loveliness of her face had made him, at first, register her as a woman.    From Wordnik.com.  [The Flaming Forest] Reference

From his cool, unexcitable, matter-of-fact way, one would have supposed that he had always been inured to the excitement and bustle of the city.    From Wordnik.com.  [Twenty Years of Hus'ling] Reference

The smooth, even, unexcitable pace of the book gives the reader the sense that Mamah was calm on the surface yet conflicted and seriously introspective.    From Wordnik.com.  [The Denver Newspaper Agency YourHub.com Stories] Reference

Concord, -- the river of peace and quietness; for it is certainly the most unexcitable and sluggish stream that ever loitered imperceptibly towards its eternity, -- the sea.    From Wordnik.com.  [The Old Manse (From "Mosses from an Old Manse")] Reference

He was a grave, cold, methodical man, a skillful engraver, a conscientious manager, every one who knew him knows how unexcitable his temperament was, and how little imaginative.    From Wordnik.com.  [Part III, Chapter I of "Uranie"] Reference

A clear, unexcitable temperament, with unorthodox and vague religious ideas.    From Wordnik.com.  [Lippincott's Magazine, Vol. 26, August, 1880 of Popular Literature and Science] Reference

He strikes me (and the English so regard him) as a man of admirable judgment ” unexcitable and indefatigable.    From Wordnik.com.  [The Life and Letters of Walter H Page]

"I had trimmed his hair, and from such talk as I had had with him I judged him to be an easy-going, unexcitable sort of fellow.    From Wordnik.com.  [More Toasts] Reference

'I need steady, unexcitable people', he said.    From Wordnik.com.  [The Girl In A Swing]

He's or'narily sitch a cool, unexcitable man.    From Wordnik.com.  [The Prairie Chief] Reference

"unexcitable" words and phrases never "loitered" through forty pages of "dreamy" and "whispering" description.    From Wordnik.com.  [English: Composition and Literature] Reference