Of the 3 guild systems I've experienced from Turbine I'd say I like AC1's pyramid scheme least, LOTRO's lifetime system best, and DDO's renown system lands in the middle. I'd prefer either a straight guild experience system (in which the numbers only go up, no decay/loss), or some sort of dual system which awards ship amenities based on experience and uses the renown (which can go up or down based on how actively the guild is accomplishing things in game) for cosmetic stuff - guild-only armor kits, flags for the ship, titles, etc. Granted, the chances of something like this ever being implemented are next to nil, but it's what I would like better, anyway.