I like what they did in SWTOR. Having one of your companion characters go off and sell your grey quality items (Lord Scourge, especially), I'm highly amused by the abrupt wave my characters do 'OFF WITH YOU, MINION!'. That would have been useful in several other games. Not sure it'd be that hard to implement it into future games either 
I love this idea, especially with SWTOR. It has a real world wait time is about 10 minutes and an hour long cooldown, if memory serves. Maybe for DA, have an inactive companion (one not in the current party) head back to the nearest town/keep to sell stuff. The more crap you have, the longer the RW wait time is, and the longer the cooldown. Or, the greater distance from town, the longer it's going to take. The items remain in your inventory until they come back, so you can't just start looting again with your active party members. Just one idea I had.
I don't like too much inventory management, especially my first time through since many times games won't let you know what's valuable. I liked having the junk category, if they are going to continue to drop greys and useless crap. Player stashes at Inquisitor controlled Keeps would also help too. For gameplay, have one big player stash stay linked to the character, that way you don't have to run all over the map to figure out where you might have put various items. This would also prevent players from just writing down the items in the various stashes and exploiting the extra space.
I also like the idea of (very) expensive packs you can buy for your mount. However, I don't want an unlimited inventory, because that is just too easy for me.
My two cents.