Only five? Well then like a lot of other posters said:
1) The return of origins/the ability to pick my race. Would love for more playable races (being a Kossith/Qunari would be AWESOME, but it would be hard to have a female Kossith PC from what I know of their society)
2) If they're going to bring the dialogue wheel back then make it more like how DA:O was. I don't want Nicey-nice answer, Sarcastic Quip, HAWKE ANGRY-HAWKE SMASH.
I really don't care if the character is voiced or not, but bring back my choices man.
3) Not as important but I would love LOVE more races for LI. Let me romance a dwarf, let me put the moves on a Kossith, let me make kissy faces at the werewolves (if there are any). Just...something. Elves and humans are nice and all but I want a little variety. I also liked/loved the all-bi option from DA2 but would be ok with having varied sexualities if it were more than just: bi dude/chick, straight dude/chick (I loved all the LI from DA:O, but I so so badly wanted to romance Alistair and Morrigan as the same gender, or even some of the non-romanceable NPCs). Like others have said, if maybe they could have straight-bi-gay of each gender (and maybe more than one) that'd be terrific too.
4) Would love to have something like the party banter/camp talks back from DA:O, and the way you talked with your party mates the way it was in DA:O. It was pretty boring to wait for people to have to/want to talk to me first before I could even initiate a conversation in DA2, when in DA:O I could talk to them whenever I wished, even if it was just to smooch my honey.
5) More varied environments/places to visit like the first game. Maybe more than the first game. I liked DA2 but hated walking through the same cave fifty times and being stuck in Kirkwall most of the time was fairly boring.
6) Would love if they could kind of alter the elves to somewhere between DA:O and DA2, as I know they said they wouldn't change it. DA2's elves worked for some (Merrill IMO just got cuter as I didn't like how she looked in DA:O) but for other it made them look just odd to me. (Why did Zevran have no eyebrows?! Agh!) But I also disliked how some of my other fave characters from DA:O changed (Alistair looked so different, and his hair color changed to like this orangey color or something when he was originally a dirty blond/brunette. Cullen's hair just got lighter, too much sun?)
7) They've already said they were doing it, but doesn't hurt to say, more customization. Not just hair, makeup, armor/clothes, etc. But it would be awesome if maybe we could alter our home base a bit (if we have one) or somehow make our home and teammates feel more like their ours.
I think Sylvius the Mad said it best though: "
The ability to play my character the way I've designed him, even if that's not the way BioWare expects him to be played.That's all. If I get that, DA3 is a triumphant return to greatness for BioWare."