I plan on learning some OGL/d20 and producing something with it. Don't know quite what yet.
I think I should at least learn the system, since I've never played a game of it. And in learning the system I'm probably going to find things that I want to change. So that'll lead me to producing some incremental piece of OGL that can be added to the general mass of OGL. Or ignored.
I'm intrigued that most people say it has a cinematic style of play. I never figured D&D was all that cinematic. I always thought it was quite like wargaming with hundreds of hit points. Not sure if that is cinemtic... but I guess it's not realistic! Feats possibly make it more cinematic than it was before.
I do know that I have no plans to do anything with, or learn much about, other games that are available under the OGL. I will use OGL to mean "d20" flavour OGL material. You may find interest in other OGL games of course. Currently the Action! system is also OGL. There are probably others.
Character Sheets
I don't have any character sheets myself. However...