I've played a noble human rogue long enough (got to Lothering) to be able to post some more detailed impressions.
The game is simply the best done by Bioware since BG2 - compared to everything else, I'd say it's good. To those who can't decide whether to get it or not - do give it a try.
Storywise, you have the gut feeling that this is a cliche patchwork, but it's modified to an extent that it didn't curb my enjoyment. Contrary to what some posters say, there is a lot of things that are in the moral gray area. NPCs both in the game-world and in your party aren't bland. Morrigan is actually my favourite so far, and I've been wondering why did the marketing dept. hate her so much. The influence system simply works, so much that *I* was influenced by the party members to do things their way.
Graphics, like I said before, are palatable. The blood isn't terribly overused, I thought it was a nice change from the standard RPG fare - meaning, a couple of drops that instantly disappear. It adds to the feeling of combat. Character models vary in quality. Morrigan's and Alistair's are good, they fit the characters. Some NPC's however have their faces totally fuck up man - especially everyone with beards. The facial hair is p. fucked up, man.
(BTW, remember the ugly guy who got impaled on a Geth stake in the beginning of ME? I believe there's a really similar one dying in the Ostagar battle scene - I'd be thankful if someone could confirm it, may be an easter egg)
Combat is fun. You'll quickly learn to use the 'H' key which effectievely disables most of your party's AI. Micromanaging does bring the memories of IE. AI is perfectly serviceable, but you'll need more than it can offer to win some of the nastier encounter.
Auto-regen doesn't hurt. It's done well. My party died quite a few times already when I got careless.
Injuries you get when 'dying' vary. Some won't affect you much (like a warrior getting a penalty to their magic or mana-regen), some will make you use that precious injury kit in an instant (like penalties to defense or stats). Injury kits don't lurk in every chest and are quite expensive (at least in the beginning of the game), so you'll really want to avoid getting injuries.
As to the C&C department, there are C&C's. DA seems like the most C&C heavy Bioware game. There are filler dialogue choices, of course, but which game doesn't have them. At least the flavour choices here are usually done, well, with flavour.
I especially liked my City Elf telling the king that he butchered a nobleman because he raped his bride. His response was a hilarious "W-what?" :D. A flavour choice with flavour.
The bottom line is - if you're not the jaded guy who insists on taking a philosophical and vanitative approach to video games, you're probably going to like it.
EDIT: Oh, performance: It runs good on my middle-low end rig with a single-core CPU. Loading times aren't a problem. There are some minor FPS drops when there's a lot of NPC's around (in Ostagar, for example), but I barely even noticed it.