I have to say that as much as I enjoy my other 3DS games, Kid Icarus is by far my favorite.
I absolutely love the dialogue between the characters, all the jokes/throwbacks to the original really bring the game to life. I know some people don't like the dialogue, but personally I find it makes the game charming.
The graphics look great! The edges aren't quite as smooth as in RE Revelations but still looks impressive. Uprising is definitely more colorful than Revelations though. Seeing some of the ground battles from the air as you fly over are quite breathtaking. 
The above image is larger than on screen and obviously it looks better with motion. The scale of the battles you will see are enormous.
The weapon fusing system is addicting and sometimes I find myself spending an hour or more just fusing different weapons together to get one with certain traits or stats.
The multiplayer is a blast! I havn't played Free for all, since i prefer working with a team. I have played tons of Light vs Dark though. I've played over 10 hours in multiplayer alone, and am not bored of it yet. I have around 700 kills so far. (It tells you your stats). There are so many different weapons to try out and each of them play differently from each other, even weapons of the same type. Then of course the powers add to your choices. Messing with weapon/power combinations is more exciting than I thought it would be. There is a great practice range that tells you how far away you are from your opponet so you can learn the max distance your weapon can be effective.
(a picture of the practice range)
This game seems to be the game that all my friends want to play when we hang out. I would definitely recommend this game to any 3DS owner.
