It's been some time since I've done just about anything game related, and I plan on remedying that. The concept is pretty simple, monstrous player characters with gestalt to alleviate some of the burden of picking level adjusted races. The rules however are less simple.
Level adjustment: I've seen many ways of dealing with level adjustment in a gestalt game, but I think I've come up with a way that is more balanced. One level of gestalt is more powerful than one level of a normal class, but not as strong as two levels, so for level adjustments I will just split the difference. To find your new level adjustment in this game, take 3/4 of your total level adjustment and round down.
Multiclassing: I like multiclassing, I like to see players multiclass. I feel it makes for more interesting and unique characters, even in gestalt. I does get a little tricky multiclassing in gestalt though. The best way to think of it is having two sides, a left and a right. If you were to take a level of Fighter/Rogue then Wizard/Barbarian you would still only have +1 base attack. That is because if you add the base attack up from the left side, One level fighter, one level wizard, that is 1.5 Base attack, and the other side, one level rouge, one level barbarian, that side's total is 1.75 base attack and both would round down to one.
Prestige Classes: In gestalt, only one prestige class and be taken per level. You can't take 5 levels of Fighter/Rogue then take Blackgaurd/Assasssin. Also to qualify for a prestige class all the requirements have to be met on the same side you take it. No taking 4 levels of Rogue/Sorcerer then moving into something like Arcane trickster. The same is true for qualifying for feats like Daring Outlaw, and Swift Hunter.
Skills: This has less to do with gestalt, and more to do with how pathfinder did skills better. It's an easy enough rule to work back into 3.5. No x4 skills at first level. Class skills get a +3. Skill requirements are lowered by 3. Jump/Balance/Tumble are now Acrobatics, Hide/Move Silently are now Stealth, Spot/Listen are now Perception. And Open Lock is included in Disable Device.
Books: Everything from 3.5, (and maybe a little 3E) is on the table. However I will be pretty upset if everyone decides to use Warblade.
Right now I don't have much in the way of story. Really I have no idea what these rules will throw at me in the way of characters. Obviously if I get nothing but a pack of demons they aren't going to be keen on a holy quests of good and righteousness. That is why on top of a character sheet I want a list of goals and aspirations. It's always nice to have an idea of what motivates the PCs.
Anyway the specifics for character creation are, level 10 gestalt, 42 point buy, Free masterwork mundane items, but no gold, must be humanoid.
I'm thinking I want to keep this small, 3-4 players. Slots are not handed first come first served