ExploderWizard
Hero
I think that some here may be confusing plug-in expansion material with actual houserules.
IMHO:
If you add a ton of 3rd party feats its not really a houserule.
If you change how a particular feat works in your game its a houserule.
Same for spells, prestige classes, etc. What material there is to choose from for a given campaign isn't the same as houseruling.
If I announce a by the book 3.5 game [core 3 books only] that isn't a houseruled game even though a huge pile of official material is being excluded.
If I then decide that I hate sorcerers and decree that all arcane casters must have a spellbook, then I'm houseruling.
So, while I think 3E saw more published optional material than any other edition that doesn't mean it was the most heavily houseruled.
IMHO:
If you add a ton of 3rd party feats its not really a houserule.
If you change how a particular feat works in your game its a houserule.
Same for spells, prestige classes, etc. What material there is to choose from for a given campaign isn't the same as houseruling.
If I announce a by the book 3.5 game [core 3 books only] that isn't a houseruled game even though a huge pile of official material is being excluded.
If I then decide that I hate sorcerers and decree that all arcane casters must have a spellbook, then I'm houseruling.
So, while I think 3E saw more published optional material than any other edition that doesn't mean it was the most heavily houseruled.