Well, if you have any "classic" style heroes (Golden Age or early Silver Age of comics), check out this link for the Golden Age Heroes SGs. We have four groups, currently, as well as some great coalition partners.
Gods of the Golden Age - Main group for classic heroes
Young Gods of the Golden Age - Teen/Young adult heroes
New Gods of the Golden Age - Reformed Villains/Rogues who have turned hero
and
League of Sinister Intent - Redside (villlain) group (with some predictably being RPd as GAH groups' members' arch nemesis types)
Gods Protect! (<---our slogan)
Hey Cookie Monster, if "C" is for cookie, what is "N" for?
Golden Age & Early Silver Age Heroes (RPers) Wanted!
Batman PWND by The Insidious Termite!
The Internet
I do indeed have one classic hero 
I'll do a bit of digging on your site and contact you about it.
Don't let that discourage you others!
Well so far nothing's really panned out, and everyone I seek out in game tells me their SG is either declining in activity, or they're the only active one and "Trying to get more" and then I don't see them for 3-4 days.
So, yep. I'd be perfectly willing (in fact I heavily prefer) to RP with a group in some fashion before actually joining them, or maybe end up not joining them at all and be one of those friends that shows up in battle to help out from time to time.
On the positive side, I've had plenty of time to re-acquaint myself with all of my toons personalities, so that's a good thing at least :P
Might want to look up Special Section 15 - SG Leader is @Alisha Shatogi, it's a covert ops themed SG. Most of us are college age or just out of it, and have weird senses of humor, but it's really awesome. 
They're almost always at least partly-IC, too.
Uh, wow. I... did not know we were getting plugged on the forums. XD
Hi! I'm the leader of Special Section 15.
Special Section 15 is an espionage/black ops themed heavy RP supergroup, focused on good storytelling, character-driven and story-driven RP. We have fun with mystery, drama, action, and a dose of comedy for our usual RP fare. Casual players, serious RP.
Hit up our site to apply - it's getting renovated (along with several other aspects of the SG) but we do have the app up and recruiting is open.
section15.guildportal.com
Thanks for your interest.
(And holy $%& Solar. o_o; Ali ish flabbergasted.)
Looks like I'll be joining these people here
I've seen several of these while browsing the forums (And used a couple to contact groups, which has produced absolutely nothing in my favor) so I apologize in advance for throwing up yet another one.
At this point, I just want to be presented with -any- themed SG or VG. I have several (10+ toons) available to join one, and I'm even perfectly willing to make a brand new toon so that it has a story to fit with said SG/VG.
The basic requirements are..
Role play being the main thing. Duh =P
Some active members (I'm talking I'd be happy with 3+ people. Numbers mean nothing if you're just another face in the crowd)
...and that's it. Restrictive innit?
So, yeah. Post here, send me a mail in-game @the X, or dance in a codpiece with the name of "The Todd" (Points if you get the reference) to get my attention. I'm easy to reach, and very flexible... and very desperate to find a group with some decent RP @_@
Don't mind being the active one if all you feel like giving is a link to look up your site.