Yeah, I prefer groups over 1x1 and unlike most 1x1s, the ones I'm in often turns into me playing multiple main characters to make up for the group feel that I love, haha . In one 1x1, I have four different main characters. If you're ever interested in a 1x1, I'd be up for it.
Advanced RP takes a little more and takes longer for a round to go by but can be lots of fun. I've found that Advanced has a wide level range just as Casual does, if not sometime more but if you give enough time and thought in your post you should be fine.
Here's a
roleplay I'm in that could use a few other players if it interests you. If not, no worries. I've accomplished my task of asking those I know to see if they're interested.