Breakfast Topic: How big is your guild?

I've seen guilds with 1 member, I've been in guilds with 500 members, and yet I've never found a guild that can be everything to everybody. I'm sure even those guys with their 1-man guilds get a bit lonely from time to time. So what is it that makes a guild too big, too small, or just right for your average player?

Would you prefer to be a member of a small, tightly-knit guild or a sprawling mass of people so huge that everyone on your server knows your guild, if not you? What does the size of a guild's membership say to you as a member or prospective member? Does size matter, and if it does, which is better - erring on the smaller side of numbers, or a population enough to start a small city?

How big is your guild, and is it the right size for you? Why? If not, then what are you looking for from a guild, and how does the size of the guild play into your perception and comfort-level with that guild?

Lots of questions, let's hear your answers!