I have a bit of experience with table-top RPGs, and I'm going to go through this thread in a bit and read it all, because I've been wanting a Bionicle RPG for years. My first comment though, would have to be to keep things as simple as possible. Too much complexity, and the players and GM will end up more in the rulebook than in the game world.I think a truly successful RPG would be one that sets guidelines and rules, but foregoes the equations. Force the players to use their imaginations. A really good example of this would be the Marvel Heroic Roleplaying Game that came out fairly recently. The game flows extremely well, and focuses mostly on what the players want their characters to do, yet still retains a solid rule system utilizing dice and stats.Be back later with more. Thanks for getting this started!EDIT: Ok, I got through everything. Sounds good, so far, I stick to my plan of simplification.For the whole powers thing, I think running a system that is based off of points would work best. Each "species" (or type or whatever) would have a different pool of powers to aquire as they got stronger, and the powers cost points to use in combat. You could increase the range, duration, power, etc, by spending more points. Running out of points could have some sort of negative effect, signifying the character being tired out or something to that effect. The only negative to this would be that it would probably involve some sort of math.The alternative would be to have a power pool similar to the one in Bioshock (what I'm playing currently, excuse the reference). Basically you'll have Fire Blast. Then you upgrade it to Fire Blast 2. It gets more powerful, it costs more points. I'm not sure which option is better.I like this FATE thing, because like I said, the simpler the better. Most players would rather get straight into the action than spend time doing equations and such. However, there does need to be structure. So I'd say borrow some of the elements from FATE to streamline the whole thing, but definitely keep the stats and powers and such.