I'd like a fame system in the sense of, if I do more quests, people in town should start to recognize me and react differently to me. In FFXI this was reflected by previously useless NPCs now offering quests to you. They basically thought "Hey I've seen this Tatl guy around town helping lots of people, maybe I can trust him with this difficult task after all." In this game it could be tied to the GC quests and that would be fine with me.

Rather than just going by level, certain NPCs might only offer you their quest when they know your name and have heard of your GC adventures. Actually I think those 3 stronghold GC quests sort of work like that since you can't do them until you rank up no? An expansion on that would be perfect. It doesn't have to be a straight rip from FFXI, but some sort of fame system would be welcome in my book. Our GC exploits should be known throughout the town, not just in the GC HQ.