I, and my group, attempted to play 4e. We gave it a good honest go, and heck I even approached it with an unhealthy dose of denial. However the writing is on the wall, 4e is simply unplayable. And more to the point no one likes it. My wife finds the pathfinder PDF, and suggests a one shot to try it out. The group was very enthusiastic, I played COD4, one player even saying he was impressed by it. (coming from him that is high praise indeed) Later that night I looked through it, and honestly, it's one of the best things I've seen in a long time. And better yet, becuase of its backward compatibility, if a player is missing something from 3e, I can, as a DM, just plan bring it back. So long story short, I'm converting my 4e Kalamar game into a 3p Kalamar game.
This thread actually has a point, and it is even related to the title. Despite 4e being unplayable, there are some small things that I do like about it. The biggest one being action points. I really like how the simplified version of action points work. The way 4e does it, players use their action point every second encounter, but i was wondering if perhaps a system of action points similar to 4e could be used. In that they are renewable resource which grant an extra standard action, once per encounter. But they aren't plentiful enough so that they are used every encounter, but aren't scarce enough that players will actually use them instead of hoarding them until it looks like the angle of death is looking them up in the phone book.
Other things about 4e I like are; healing surges, the simplified encounter building system, and well...thats about it actually...