Bad
Similar WOTC booth experience. Maybe not as bad as others have posted, but general indifference from those on the other side of the counter. I also left their booth telling myself I'll just save some money and buy the stuff on-line.
Played the Delve twice and had two bad experiences. I was surprised at this, because I played many Delves at DDXP and had a blast. I guess I was just unlucky in the table make-up plus DM draw. The first table was later at night, and you could tell the DM did not want to be there anymore. Add in a moron player, who won initiative, then proceeded to argue with the DM in a frickin' Delve... Next trip through I had a good DM, but half the table were friends and what I would label “elitist” gamers. I should have known in line when they were quizzing me on how much I've played 4E, as if I would be holding them back if I didn't have an extensive knowledge of the system. Luckily for me I've been playing it since before it was released. About three rounds into the first combat, when we were getting trounced, one of them leans to me and asks if I've used any encounter powers yet. I looked at him and said “Yes, I've used every one of my encounter powers other than the one which involves skill checks.” The shut him up pretty good, and I was actually happy when one of them died.
Good
The two LFR games I played in were both awesome. The modules were good, the parties were good and the DM's were excellent. I would like to single out Stormtower here, as he ran the Thursday 8:00 a.m. slot of Sense of Wonder I played in. He was an exceptional DM and I sure wish he lived close so I could bribe him to run our home games. He was prepared, had all the DM gadgets, the NPC voices, and all the other little things that make a gaming experience fun. The status tracking system which he mentioned in his post was awesome, and I made sure to get his e-mail address so I could get a copy of it. Here's another compliment for Stormtower - You're the best DM I've had since Ed Greenwood! Put that in your sig
I played and ran in the Blackmoor campaign, and as usual had a great time. I don't know what it is, but the players in that campaign are so down to earth. I even volunteered to run an early Saturday game for the group I ran on Thursday, forgoing my plan to sleep in, just because they were so cool. I was able to play in a sneak peak of Blackmoor 4E, and can't wait for that book.
Of course the best part of Gen Con, and the reason we go, is to see friends. As we get older, in our mid-30's now, the people we grew up gaming with are spread out all over the country. Ten of us made it to Gen Con this year, coming in from four different states.