New player questions

[Evilmagus]

Hello

I played a rogue back on Fennin Ro in 99-2003 pretty intensely (I think my Mrylokars Dagger item submission is still up on Allakhazam) Decided to check out p99 finally but definitely as a casual. Never did PvP in live, so considering red but hear it's pretty empty. I have a couple questions:

What's the scene like for casual?
Any groups to be had at low - mid levels?
What classes are in demand on red?
Is sleeper still asleep on red? Hey maybe one day I get the key...

Thanks