Jenny Johnson is my favorite, but Adrianne Curry is catching up. Who amuses you?
Author, Jonathan Carroll @JSCarroll
English writer/TV guy, Charlie Brooker @charltonbrooker
English cricketer Graeme Swann @Swannyg66
are all interesting.
@pattonoswalt
@wilw
@josswhedon
@feliciaday
Why yes, I am a nerd.
It was Roger Ebert. 
I follow a few obscure people. My favourites are:
Tim @Omundson, from Psych
Everyone likes @WilW*, @FeliciaDay, and @DontTryThis Adam Savage
@VanessaRagland from my favourite podcast Pop My Culture
@AlisonHaislip, geek of some standing
@RichardOsman, a UK game show co-host and Endemol producer
@StephenMangan, UK character actor, very funny in his own right
@Qikipedia The official QI/John Lloyd feed, full of interesting facts and silly observations
@DamonLindelof, unfairly maligned screenwriter
@HughBon, Hugh Bonneville, actor from multiple things but most famously Downton Abbey
And a couple of local comedians:
@MrTonyMartin, cult radio personality
@Calbo, Cal Wilson, stand up and ex-pat Kiwi like me
And a whole bunch more that post less frequently, but can be sporadically funny.
*Except during Ice Hockey season
Mine, too.
Model Chrissy Teigen is usually hilarious. For serious news, Rachel Maddow.
Yup, here too. Chaz still posts items at times.
Some others I follow include Penn and Teller, Bill Nye, Ben Goldacre, Matt Berry
Dammit… forgot Neil deGrasse-Tyson and PZ Myers too.
Ricky Gervais is quite amusing throughout the day as he spends it poking theists with sticks.
@JaneEspenson Currently writing Once Upon A Time worked on Buffy and other shows
@CarltonCuse Bate Motel writer also wrote Lost