New Guy :P
Welcome! I'm glad you found our odd little family. I've been here over 6 years myself (and am still a newbie compared to some) and I can't get enough.
Please make yourself at home, and feel free to ask anything you'd like. We love helping new people, despite how busy everyone is this time of year.
This site has some of the best roleplayers and GMs I've ever encountered, and I've been privileged to meet many good ones over the years.
We have at least some of the games you've mentioned, including many more that you might like to try. Since the games are run by regular gamers like us, it can be kind of hit or miss. But there's always new games opening up.
Have fun!