Stat bonuses go from -2 to +2.
Fighters can crit on a natural 20. Crits do maximum damage - no damage roll required.
There is no Turn Undead in my game. Clerics do +1 damage vs. Undead in melee to make up for this.
Maximum level 10, even for mages.
Elves use the variant class, not the weird one with fighter one day, mage the next.
No demi-human level limits. Everyone can reach level 10.
AAC throughout. I hate Descending AC.
That's about it. Mostly small changes, except for demi-humans.