I was really excited to get a Wii beginning of this year but after the inital happiness, the hype has gone down for me. The only game for it that I want this year is Super Mario galaxy. I am becoming more of a casual gamer and will be going to law school next year and moving away. I doubt I will take my Wii with me since my parents love it so much, so should I get a DS and start getting used to portables now that I will be moving away and all??

DS is a great system to have with an astoundingly huge variety of games. Not a bad choice to stick with and have fun with portable games (look at Japan).

It all depends upon what sort of games you like. I've been pretty disappointed with my DS, outside of a few specific titles like Advance Wars and the Castlevania games. The content on the DS is largely geared toward the casual crowd, with the best games being puzzlers, adventure games, or "oddball" games like Animal Crossing.

There are quite a selection on the DS if you are willing to dig into the obscure and less-known games that are still good to better, though far more niched in their target audience.

Edit: Basically, List what games you like and we'll come with some recommendations and what not. 

I have both and definitely prefer the DS to the Wii this year, but the DS has been out longer and has had lots of games coming out for it, Wii might catch up next year.

DS is the best system out right now. Buy it. There are dozens of great games spanning all genres.

Well, 3rd party support has just started to catch up the DS's success. If you're not a big fan of Nintendo's franchises such as Mario, Yoshi, Donkey Kong, etc., then the DS probably isn't for you.