Eh, it depends what you’re in for.
You played the HL2 games? Ever wanted to join the action but with your own character? Try out HL2RP, TnB (Taco and Banana) have a few HL2RP servers up, and there’s others floating around all over the place. Shamelessly mentioning my own server, Hostell Roleplay, we’re also a HL2RP server.
Past that, there’s servers that offer immersion into other canonised gamemodes from a ton of other games. There’s FalloutMod (which is in beta I believe and being coded by one guy now that the original developer left, but it’s still beautiful) which isn’t EXACTLY like Fallout 1, 2 or 3 but it has a lot of the same aspects, really addictive if you have a great bunch of roleplayers with you.
There’s a few S.T.A.L.K.E.R. Roleplaying servers out there that I’ve seen around. Never checked them out because I’ve never played S.T.A.L.K.E.R. before so I don’t want to be shitty.
There’s also just regular ol’ Real Life Roleplay servers, they’re abundant and yes MOST of them are DarkRP, but not all of them. Try find some ones running a modified Cider or CakeScript, they’re generally the best I find.
There’s a few others I can’t exactly describe or feel like describing right now, but they’re usually renamed DarkRPs anyway.
On that note though: You people need to stop automatically shutting down DarkRP. That gamemode is not a bad thing. The bad things involved are minges, idiots who can’t roleplay and the ability for minges to be exclusively retarded. DarkRP (like any other gamemode for RP) can be just as good as Tacoscript or Cakescript or Cider script. The gamemode does not make the Roleplay, the people involved make the Roleplay. The gamemode just helps… a lot. But still, you could roleplay effectively on sandbox, you just need to be creative.
Hope I’ve helped a little at least. But you should let us know what kind of roleplay you’re after first then maybe we can point you more in the right direction.