Hey, I have been wondering why so many people seem to be against Gestalt? I get that they're more powerful, but that also means you can throw some bigger monsters at players.
I mean I absolutely don't want to kill players, but it's fun to see throw things at players and make them figure it out.

It has been my experience on RPOL that Pathfinder GMs in general are afraid of anything that makes characters "powerful".  I don't know about D&D because I cannot bring myself to play it now that PF is out.

Because building encounters that are challenging without resulting in TPKs or having to be constantly adjusted on the fly is hard.  Like, really hard.  When you give the PCs more power, you inherently make that balancing act harder.  This is especially true with RPOL where you generally want to minimize the number of combats in your game, making the normal attrition-math-model even more delicate.

I've run and played gestalt before, and it's alright... but Pathfinder fixed a lot of the issues with 3.x that made it so attractive originally.  So, it can be kind of overkill.