Couldn't find a more appropriate topic and didn't want to shove another one into the archive, so I'll post this here.
I designed a game and setting for some real life friends to play with. Basically, I took Pathfinder and made a LOT of changes.
A few of Pathfinder's classes, all with some changes, and some completely new classes.
Got rid of the typical Vancian magic system (hate it so much) and introduced a custom "spell creation" system similar to 13th Age while adding a resource (stamina) that fuels the spells.
Gutted the feats list, tried to only keep ones that were good, for either RP, combat, or utility, or any combination, and added new ones to hopefully fill gaps and make certain builds more viable (throwing weapon builds for example).
Other smaller changes, including making it so anyone can use power attack/deadly aim (and removing those feats to hopefully remove some feat tax), getting rid of BAB while keeping level progressing additional attacks (and accounting for lower attack rolls due to no BAB), and redoing the alignment system so that instead of the 3x3 grid, it's more of a "this deity opposes that deity, if you're good you're good, if you're evil you're evil".
What I need help with is coming up with more ideas for feats, things to make sub-optimal builds more viable, ideas for fun feats that add fun stuff for the players to use both in and out of combat, buffing specific classes, etc.
If anyone's interested in looking over and reviewing my stuff, I could post my files, just keep in mind that I'm fully aware that it's likely an unbalanced mess, but the players are having fun and don't have any complaints about balance, so that's not a very big deal.