Edgar Ironpelt
Adventurer
It's not really core-only feats, but rather a removal of the "official" certification from the non-core feats.With core-only feats, wouldn't a high level fighter-ranger gestalt end up running out of interesting feats to take? There are options in the core, but not that many with great synergy (especially considering they'll get the TWF tree for free).
It happens that I like the concept of feats, if not always the implementations, or the official conception of how feats are supposed to work in general. (E.g. Toughness being a flat increase to hit points rather than a per-level increase, or Dodge being situtational against specific opponents rather than a simple +1 bonus to AC.) So I'm fairly generous about putting new feats on the Approved For The Campaign list, once I check them out and possibly modify them. I'll add my own to that list, and I'll borrow from various and sundry sources, including random internet ideas and player proposals. I just give short shrift to the argument "It's an official WOTC feat, so you must allow it!"