• Repetitive environments. Once you've been in one cave, you've been in every cave. Is this a necessary evil of a 50 hour game?
• Enemies almost always ambush your party by spawning out of thin air in a circle around you. While this isn't a problem on Casual or Normal difficulty (because the game is a cakewalk), it gets annoying on Hard and Nightmare. I frequently had to park my team, run ahead and trigger the ambush, then pull them back.
• The game's difficulty curve is reversed. The game gets significantly easier as you level up and improve your equipment. The Ancient Rock Wraith is light years harder than the game's final boss. Origins had the same problem.
• They needlessly removed the tactical view from the PC version. This makes it harder to move your party around the map and target AoE abilities.
• Hawke can't be a dwarf
• Importing your DA:O save is almost meaningless.

That stuff said, I love the game. I played through the whole thing on Hard in 46 hours. It was a blast. I've made this list before in similar threads, but here's what I like:

• More Sandal
• Hawke having a voice and the dialogue wheel makes every conversation infinitely more enjoyable than Origins. I love Origins, but so much was lost when my Dwarf Commoner would blankly stare at people. The game is also frequently funny if you play Hawke as "snarky".
• I enjoy that the game's story isn't the cliche "save the world" story that is so incredibly overdone in video games. I didn't know how the game was going to unfold. My choices resulted in things I didn't see coming, which made the game immersive.
• While it's hard to be cooler than Shale, the companions in DA2 are great and I enjoyed their quests. Varric is a complete pimp, I hope he's somewhere in the eventual DA3. I love that they hang out at their houses/jobs instead of at a generic campsite. Also, unlike in Mass Effect where the DLC characters seem tacked-on, they did a good job of incorporating Sebastian into the main quest.
• I was bit in the ass frequently with the consequences of my earlier actions.
• The game is littered with complex boss fights. They remind me of raid bosses in World of Warcraft. The Ancient Rock Wraith was a grueling dance keeping my party alive while we slowly chipped away at its health. Killing it was a pure rush. YMMV
• Combat is more enjoyable than it was in Origins. Besides having like 100x the eye candy, cross-class combos are needed in the latter half of the game and are fun to pull off. Watching a brittle boss explode into dust after being hit with a well-timed Punishing Lance is grossly satisfying.
• As I said before, it took me 46 hours till I saw credits. I wish every game I bought gave me that kind of bang for my buck.

So anyway, yes, someone else is really enjoying Dragon Age II too.