GMing (general discussion)

Today I just want to throw out a bunch of questions and see what responses I get, letting the discussion branch out from there...

• On average, how satisfied do you feel about your GMing?  Does that feeling or your perception change when you're at the table running (in the moment), hours after, days after, months or years after?
• Have you ever had a (you assumed) moderately satisfied player from the past come up to you months or years later and tell you how much he appreciated your GMing or that you were a great GM compared to what he encountered later?  Ever had a player tell you how much you sucked?
• Does grumbling, complaining, whining, etc. bother you when it comes to either house rules or a particular ruling vs. book rules (RAW)?
• Do you ever feel that you don't receive enough credit, recognition, accolades, understanding, or appreciation for your GMing?
• As a GM, do you feel the need to "entertain" players beyond your usual GM duties?
• Do you think it's best to keep yourself separate or apart from the group to some degree, similar to an employer around his employees?  Or are you just "one of the guys" and completely informal and chummy with the players when you're not actually GMing?  What about when you are GMing?
• How often do you get one or more players in your group asking if he (or she) can GM soon?  How do you feel about that?  Do you generally take it as a compliment because obviously you make it look easy and fun?  Or do you take it as an insult for encroaching upon your turf?
• How often (if ever) do you wonder how much players are enjoying the game, each session, the campaign, and your GMing?  Do you regularly ask for feedback?  If you do, are changes ever implemented?
• What are the three most important qualities for a GM to have?
• Do you have a particular word, phrase, question, or statement that you frequently employ during the adventures you run?  What is it?
• How long, generally, before you start to feel GM burnout?  

VS