I'm looking for a solo game, I've got a few ideas for characters for any of these systems, but I'm of course willing to adapt them to whatever setting or theme you might have in mind, or of course, create brand new ones for better cohesion.

I don't have a preference for any of these systems, I like all of them. I'm decently experienced with all of them as well, though I haven't played GURPS or Pathfinder in about 5 years each so I'm rusty for sure. I don't care about maturity rating either. I'm very flexible. If you're interested in running or setting something up, hit me up!