I like enthusiasm when I'm the one feeling it.
Check the google wave presentation for example. These people are not dull nor boring, and they get applauses and cheers on and on from a room packet full of developers.
Intel's nehalem EX chip inspired enthusiasm and it was presented in way cooler fashion, without bursts of untempered behavior.
Windows7 is a very cool product, compared to others from Redmond, it almost gets me enthusiastic
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I don't like Ballmer, I admit it. He's not an average, he's got his talent, but he's got no charisma, and perhaps if he wouldn't be such a buffoon, he would be dull and boring.