On its face, it may seem like a simple question, but let's really drill down. What would change about your playing experience if you didn't have your guild? How has your character changed based on his or her last guild switch. How do you interact with your guild IC and OOC? Positives and negatives entirely welcome, but please don't use this as an opportunity to throw jabs at people.
You say to Slyphe, "You're so freaking smart."
"^," Slyphe agrees with you.