On a more house rule note, I found it silly that liches get the vampiric bonuses to skills (namely, +8 racial bonus to Hide, Listen, Move Silently, Search, Sense Motive, and Spot checks just like their cousins, the nosferatu)... IMC, these racial bonuses are replaced with +4 racial bonus to Concentration, Knowledge (arcana), and Spellcraft checks. This does not give them huge boosts, but emphasize their magic-using nature rather their roguish one. Any of you have made similar changes to the lich template?