The fact that online will totally put me off the game.
I know what your thinking. ZOMG ONLINE = TEH AWESOMESSS
But honestly, apart from mario kart and tetris every online game nintendo has put out has screwed me over one way or another.
Let me point out some things from the ones Ive played:
Metroid Prime Hunters - Not a bad game but online play is dominated by hackers and people that take advantages of glitches. With no way to update the game these still remain and many people just want the wins.
Mario Strikers - Im not fantasic at this game, so i dont know much about it but ive noticed that lag will play a major part in the game. Even if youve gone up against someone with a full connection rating it still happens. Things like megastrikes, even though they take place entirely on one persons system (As in, apart from the end result, there is no requirement for data to be sent) there is still lag. Its...slightly agravting, doesnt effect the awesome 1 player and offline multiplayer, but kinda spoils the online fun.
Rankings - A lot of the online games Ive played have rating and rankings. Theres two types of ranking and one I have a huge grudge against.
Firstly, the good type. A good example of this is team fortress 2. The rankings contain NO negative rankings (eg deaths, losses). Even though these arent there you can still determin a persons skill from them. It has your high scores, achivements, top rankings with each character. I love this, its still a rating system but its all positive.
Then theres the bad, the ratio based ones. I know what your thinkin "YOUR JUST AFRAID OF LOOSING" etc etc. BUT hear me out. When people have a ratio to protect, they will do ANYTHING to protect it. As ratios become a big part of a persons respect in a game people take them very seriously. Some people will hack, glitch, cheat, do cheap/lame stuff in order to desporatly protect there ratings.
I want brawl to be FUN. I want to be happy, even when loosing and not have to worry about protecting my "online image"
Sorry for the long read.