This saddens me a bit to realize and put into words...
Let me start by saying that I supported 4E since the day it came out. I played the Hell out of it. I DMd several 4E groups at my FLGS. I took part in the GSL and released a lot of original material for 4E. I was one of the staunchest supporters of the new edition. I fought in the depths of the Edition Wars month after month. I brought dozens of new players to D&D via 4E. So, before I'm crucified as an average 4E-hater, take a minute and consider my position.
What I feared would happen finally did...it became boring. It became more about the maps and minis than the role-playing. I'd spend countless hours making maps and writing deep adventures just to have the players zip through with little regard for RP. Whenever a thought-provoking storyline would be introduced, the players grew bored. They were simply waiting for the next map to be put on the table and for initiative to be rolled. They hated Skill Challenges. When I would gently force RP on them, they'd lose interest. I don't know how many times I had to hear, "When do start fighting?", only to get into a fight and have to hear, "My God, will this fight ever end?". As a DM since the mid '80s, I didn't like what I was seeing. So, I did something drastic...I went back to 1E/2E.
I never liked 3E to begin with, so that was just out of the question. After playing 4E since it came out, I had been having this unexplicable urge to bring out some of the older material and play AD&D again, so I did. I've seen many who say that felt that pull of nostalgia while playing 4E, and I felt it right along with them. I finally just did something about it. I sold all of my 4E material (which was everything released to that point), stopped my FLGS games (much to the disdain of the players and the establishment owner), and dug up all of my AD&D stuff...536 books, to be exact, and started playing that again. I must admit, I'm not sure I had this much fun with AD&D when it was still the new thing. It honestly revitalized D&D for me, and for those I DM for.
I'm not going to say that 4E is bad. I spent too much time and money on it to make a silly claim like that. What I will say, though, is that...in the end...it just wasn't what I was looking for in D&D. It's a fantastic tactical minis game, that's for sure. It has a great backbone of rules in which to build from. It's a balanced, well thought-out game. But sometimes...just sometimes...I care more about fun than perfect balance. I missed the randomness of AD&D. I hate to say it, but I missed SoDs. I missed THAC0. I missed having huge battles without pulling out one mini or map. If I did have a map, it was a sheet of graph paper with a few doodles on it. I missed all of that, so I went back to it.
I do wish 4E and WotC the best...they have made a great product...but this old-timer is just too much of a grognard, I suppose.