I like pretty much everything listed here.
Offhand, the only things I DON'T like about 4e are the relatively limited author-stance mechanics (1 action point + 1 per milestone?) and the dorky monster names. The monsters themselves are great, but I do so hate the Adjective Noun Such-and-Such naming convention. The flavor text on the powers is sometimes as bad. As before 4e came out, I wonder why they couldn't have gotten a loaner from the Magic the Gathering creative team, who do such a great job with a similar naming scheme and tiny, pithy sayings to highlight game elements.
The actual monsters (and the rules to create them) and powers are excellent, though, and none of the really eye-roll-inducing text need come out at the table.
Skill Challenges needed, sadly, just a LITTLE more work to be really good instead of just a good idea. Fortunately, between the official and unofficial fixes they now bring as much awesome as their concept promised.
I could take or leave the proficiency bonus system for weapons, but it seems to add a nice dimension to picking them, so... good, I suppose? But I didn't click it on the poll.
Tiers of play... well, again, 4e is the first edition of D&D that makes me want to play D&D for its own sake, so I don't mind these in the context of the game. In the abstract I'd want to play heroic tier only, though, as it's more sword and sorcery.
All-positive racial mods do nothing for me either way. I suppose they reduce the range of ability scores, which is probably beneficial. I do like racial powers and feats a LOT, but didn't click the box because the ability score thing is rather meh.
I think I clicked everything else on the poll.