Not the poster themselves, just their handles.
Personally, I just LOVE:
Manservant Hecubus
Morrison’s Lament
SwimmingRiddles
SPOOFE bo diddly (I know, he’s just SPOOFE now, but I liked the bo diddly part)
Satan (purely because of the sig, which never stopped cracking me up. “yer pal, Satan”
Fear Itself
Whack-A-Mole
Duck Duck Goose
Stupendous Man
Ukelele Ike
CrankAsAnOldMan
Jeremy’s Evil Twin
Czarcasm
i know, I took most of the best ones. 
stoid
I’m a big fan of Quasimodem & Shirley Ujest. There are quite a few more, but I am blanking on them right now. Grr.
Fortunately you missed:
Sue Duhnym
Tequila Mockingbird
Woodstockbirdybird
Obsidian Flutterby
I love GingerOfTheNorth, sounds like a superhero or a bad spin off of Gilligan’s Island.
I like Arden Ranger because Amber references are cool.
I’m sure I’ll think of others, but that will do for now.
I liked
and London_Calling, 'cos it’s one of my favorite albums
The rest of you SUCK. 
i think Tars Tarkas is the coolest name ever!
but i may be biased…
(someone had to nominate themselves!)
Let’s not forget my favorite fantasy creature who’s a master at self-promotion.
The Mermaid
Well shit, maybe not quite to masterful after all.
I just encountered a newbie today named:
happylittlevegemite
COME ON! That’s fantastic! and also
hightechburrito
Don’t forget donkeyoatey - not only a great pun, but I always hear it in my mind just like a (cartoon) donkey would say it.
One of my all time faves –
Poohpah Chalupa. Cracks me up.
The one that sticks in my mind is FireUnderpantsBoobs.
Mighty Tiki God
SirRhosis
I like aha because every time I see it, I start singing, “Take on me (Take on me) Take me on (Take on me)…”
I like Loverboy, but only because I named him that.
I like Bosda, but I never remember the entire thing.
Also…
CrankyAsAnOldMan
Zoggie (sounds like a nickname I have for one of my friends)
Weird_AL_Einstein
zgystardst
** TwistofFate ** Gotta love a Hardy Boyz reference-now all we need is someone named SwantonBomb 
** blur** -Every time I see his name I get that song in my head…" Woo HOO "
labradorian 'cause it refers to such a cool place.
FireUnderpantsBoobs - those are three of my favorite words.
I gotta second Manservant Hecubus as a cool name because I considered going with Sir Simon Milligan for mine.
I always liked the handle “ThisYearsGirl”, because it sounds so 1960’s to me, which provides all sorts of cool cognitive dissonance. (And she’s a cool poster as well)
Fenris
I love the name **Sapphire Bullet.
Of course, I have said this over and over again and it bears repeating:
Dijon Warlock
I giggle every time I see the name!
Damn! Someone has deduced my secret identity! Quickly, Muktuk boy, to the sled! We must warn Mary Anne and the Professor!
I like:
Cartooniverse
Poopah Chalupa
Manservant Hecubus
Anti Pro
SqrlCub
Doobieous
FireUnderpantsBoobs
UncleBeer
Crown Prince of Irony
Quasimodem
Sue Duhnym
Raving Nude Hermit
Sofa King
Repeats, some of them. But everyone needs to know a little of their fan base.
Wow I made a list! Actually I think last time someone did something like this (Only I think it was called ‘Most Imaginative Names’) I made it too… only then I had a different name that one being TopazAntares…
Hmm for my list:
Cumber
Verrain (I dunno what about it but I thinkit’s nifty)
Shirley Ujest is great… took me a bit to get it though. Yes I am dense at times.
I’m tired so I can’t think of more… but I like the one’s listed as well.