European play-by-post RPGs
I'm American and I have floating schedule. I have a friend on here, whom has floating Schedule that lives in Texas doing guard duty work. Him and I often meet up with people from all countries because we post so much outside of our time zone norm. Both of us are familiar with posting at 3 AM or even 5 AM BEFORE sleeping. In fact, I personally meet MORE people from the Europe and Asia than I do Americans, because of the fact I'm not posting to their schedule frequently.
On the other end, I also have a thorn in my side, a woman on here whom I very much don't get along with, because she's condescending, passive aggressive, a cheater and claims to have more professions than batman. One of which is boasting to be a deadly martial arts trainer, another a well respected mathematician. These are only two of the more moderate claims.
I say this because she's from the UK, and I'm from America, yet her and I cross paths more than joggers on a circle track.
So it's all about finding a posting rate, and posting schedule you enjoy. You may have better luck if you broaden your system preferences. I played D&D exclusively for years, and met the first friend and another from the UK that way. Since, however, I've met more people aligned to my schedule, despite it being erratic, by broadening my search to some other game systems.
Like donsr has said, there's quite a few games like that. So many, in fact, that even if I was allowed to list them all, I wouldn't have time to.
If, however, your search is very specific, you might end up seeing only the same people, over and over, regardless of GM, because you picked a system that's dominated by...these same people. That might be why it seems like "all" games are like that. I certainly felt that way.
Just some thoughts.