Cartooniverse and Vivalostwages have already been mentioned, but I have to second them.
I also am partial to Shirley Ujest because I adore her posts and I hear Robert Stack every time I read her name! 
StupidSmartAgain, was interesting, but not descriptive, because he wasn’t smart.
Others I like, Obsidian Flutterby, MyFootsZZZ, drainbead, SwimmingRiddles, oldscratch, ssskuggiii and the late poohpah chalupa.
Actually I read a topic you posted in once about how people got their usernames and I think the accidental factor is why I like it so darn much. That just makes it funnier!!
I am on the Heineken so maybe this won’t make sense later but it looks okay so far I think!
Thanks.
I like Quasimodem–very clever–and I wonder if Aesiron and nineiron are siblings.
I can’t believe I forgot Kn*ckers. One of the best names ever. She used to insert all kinds of stuff where that asterisk was.
I miss the heck out of her.
Kn(doesn’tposthereanymorebecauseshechangedjobsanddoesn’thaveinternetaccessanymorebutweallrealymissherandwanthertocomebackandfillourliveswithgleeandreallystrangeideas)ckers come back!
Hmpf! Why did it wrap like that? I didn’t use any spaces!
NoClueBoy is one of the more better creative names, IMHO.
Other names in randomness that always catch my eye:
glee, Slykyn, fenris, tubadiva, and a gaggle of others that escape me right now.
Oh, and the name **Cecil Adams ** just totally rocks! 
I’ve always been partial to Gatopascado myself.
For the hehehe factor, I like Sat on Cookie.
A new one from last month that caught my eye: BraveNewSquirle
I like The Wrong Girl because our names have similar origins.
Righteous Granny, MeanOldLady, SatOnCookie, EddyTeddyFredy. Reading the name Happyscrappyheropup always makes me want to go out and pet something.
I always laugh at MC Master of Ceremonies.
Aww, thanks Beech . Love ya.
My personal favourite is fizzygoodmakefeelnice , because it’s a line from “Black Books”, one of the best and most underappreciated comedies in recent years, and also a brilliant description of Alka Seltser.
hahah I vote for that one too. And also “Holy Shit I Like Pie”
zzzzzWHATWHATzzzz is one of the more clever names, I think, in quite awhile.
I know the backstory! I know! I know!
I’ll tell if you bribe me enough. OK, I’ll give you all one hint. It involves someone named “Smith”.