Id like to say 3 here, In reality I've been in 6.
5-10 Guild004, First guild, no clue why I joined It was already dead lol
10-25 Oracle of the Dead, Went on a mass recruitment and a guildmate from 004 went there so I followed, guild soon was systematically dismantled and left to rot.
25-158 Pagan Wolves, My first home. Made many friends there and loved my time. I learnt so much from so many people and when I rose to the staff ranks I believe I returned the favour a few times over. After awhile I felt I needed to move in order to better enjoy the game as I believed PW was turning into a job more than a game.
158-511 Celtic Warriors, Honestly... no idea where to start. I became me here lol Formed many a close friendship, met some amazing people. It was weird being a small fish in a large pond but after awhile I got used to it. Again somehow I managed to get onto staff, makes you wonder for the future of all nations if I can make it to co-founder

Anyway, in pretty much a carbon copy of PW, being on staff became more of a chore than it should have. It started to make me fight with friends, that's something I don't think should happen just because your on staff. As a result I, along with others took the much agonised over, very difficult step of leaving. This was THE hardest day of my FS life to date. I was a mess lol Honestly, I don't know how some people can move all over the place...
511-511 and a bit
Inglorious Me and Reg, Had planned on staying for a bit but a spot opened up. Will always cherish the memorys of those days alone... with Reg.... and cake (really was like 30 mins lol)
511-Now For Fracks Sake The
ONLY place I ever even considered going if I ever left CW. I made a lot of friends with the frackers through titans and got to know a few over Skype too. Fantastic bunch. I expected some things, but others have surpassed expectations. For one, frackers are not heartless FSP making/leveling machines as I picked up from the forum

j/k But ya, I'm not going anywhere, and am never getting on staff, always ends up messing stuff up lol
If they are, they became a great player with a great character and accomplishments due mostly, if not entirely, to the guild that supported them. How exactly is another guild, except in cases of guild death or complete change of playstyle, going to improve on that?
It's not going to, is the short answer.
What about if said player is supporting the guild rather than the other way around?