I have a couple of times, in addition to playing through with old saves.
There's no real difference.
The game plays more or less the same, but there ARE tons of little details that you'd miss without a previous save (lots of small side-quests, email from side characters, specific dialogues and so on).
I just saw the funny expression at youtube, well if you said it is alright I believe it should be ok, because I know you will not go easy on the game if you spots a constant nuisance, that's why I trust your judgement
You bet I'll not go easy

I honestly don't remember any noticeable problem with the faces in DAI (the characters are rarely pretty, but that's a design decisions - previously established pretty char like Leliana and Morrigan are actually gorgeous).
That being said, DAI is what I would consider "interesting, but mediocre". The game has lot of ambition, and the world background is actually very well-done and rather deep (a lot of thinking about what history is and how it's warped by time and politics), but the gameplay is downright bad and most of the game is rather boring between some moments of brilliance. I'd advise especially to NOT be a completionist on the world maps, just do the quests that interest you. If you clear everything, you'll be sick of the game to death by the time you've finished the first one.
Bioware definitely isn't very used to open world design.
Thinking about trying Oblivion.
Convince me, people.
It's
cheap (though not as cheap as a game so old should be) and is a very big open world game. If you never tried it, it might be interesting. If you just want to dabble a bit in it, then just get it and try. If you intent to play it a bit more seriously, then I'd strongly recommend using a total overhaul mod that deal with the level scaling, and possibly the leveling system (which is a mess). I'd advise not to go down in the modding bonanza until you've got some experience though, the game is pretty unstable and adding tons of mods will make it an exercise in frustration rather quickly - just stick to a few that deal with the most glaring problems.