I'll go ahead and give 3 things I very much like in F4 material so far, and 3 things I very much
don't like.
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+ Graphics. Obviously the game world looks great and has that next gen feel. The super colorful pre-war is pretty amusing and provides a nice contrast to what will be the present as well.
+ VATS slows down time rather than stopping it altogether. Looks neat, though probably still slows it down too much to make VATS challenging and actually fun.
+ Power armor. The thing about power armor in F1/F2 is that it made you look (and feel) like a walking mountain. Cheesy? Maybe, but there was a certain power to it. In F3/NV, while the designs were nice, it just looked so small, more clunky than intimidating. That said, PA in F4 is BIG, and that's great!
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- Voiced protagonist. Doesn't have to be a bad thing if done right - Planescape Torment had the Nameless One voiced, but since he was voiced only for some lines (mostly orders), one could imagine what tone he's using during certain lines, which might change depending on what kind character the player was roleplaying.
The same "sure, I just want to help you!" line might be imagined as read in a positive voice by a goody-two-shoes, in an ironic tone by a mercenary who's just in for the loot, and with a sly and dark undertone by someone who actually plans to screw the NPC up. Here, that's taken away from us, and that makes me sad. But not as sad as the...
- Dialogue system. HNNNNG!! Really not a fan of picking options out of "happy/sad/hungry/fart" and learning what line my character says AFTER I make the decision. Between these two, immersive roleplaying in dialogue is pretty dead, and that's not what I want out of my Fallouts. <hugs CDs>
- Super Mutants and Brotherhood. Been there, done that, far too many times already. I'd rather we had new things instead of reusing old things over and over in settings that don't make much sense of having said old things. Both of those factions have one specific distant source and they felt already very forced to have around in F3, where the Capital Wasteland was waaays from it (experimental vault that really stretches F1/F2 lore isn't enough to be ok with it,
"rogue chapter of the Brotherhood on a throwaway mission" has been already played to death, and hey, the Enclave is here too, in legions at that, how convenient and not in conflict with its destruction at all).
New Vegas did it right, with having old factions but in a way where they clearly (d)evolve: the Brotherhood was small, damaged and dying, super mutants were few, old and often senile, and the Enclave was little more than a memory of the past. If F4 really NEEDS to reuse these old factions (which it doesn't but is doing anyway), I really wish there is a good reason/development with them - but how it was done in F3 doesn't exactly give me hope.