Thanks everyone and especially The Question.
I really love my Nintendo DS. I was thinking of buying Nanostray 2 but instead bought Top Spin 3 for only $19.50 (not used). Good deal eh?
Here's some games I've played -
*=Rented
**=Bought, but returned.
**
Metroid Prime Hunters - Wasn't really a big fan of this game. Probably because I thought the game was too complicated and the game was a little too dark in places. Although, it seems that I'm the only one who dislikes this game.
**
Super Mario 64 - I'll stick to the N64 version, because I didn't really care for this game either. Pretty much the same thing has MPH.
Mario and Luigi: Parnters in Time - Haven't played Superstar Saga, but I love this sequel. It's kind of like Paper Mario and that's not an issue at all. It's fun and not as easy as you would think. I might return this soon though, because there's not much to do after you beat the game (even though it takes a long time to beat the game, but once you get around to that, there's nothing else to do).
Mario Kart - Addicting and never gets old. It's exactly what it is: Mario Kart. One game where it has loads of stuff to do (campaign mode, online, minigames, etc.) Recommended for sure.
Star Fox Command - One of my favorite games also. It gets a little repetitive, but the game is so fun that it doesn't matter. Tons of different storylines and online mode will make you be playing this for awhile.
**
Spider-Man 3 - You would think a game based on a movie would suck, right? Well, not entirely. This game is really fun with nice controls that makes it addicting. But the only problem is, once you beat the game, there's not much else to do. I would've kept it but I heard there was a new Spider-Man game coming out, so I turned it in.
*
Spider-Man: Friend or Foe - This was the reason why I turned in Spider-Man 3, and I'm glad I didn't buy this game. There's nothing really special about this game and it gets dull a little too quick. It's not bad, but not great either. More leaning toward the bad side. I would skip it.
**
Resident Evil: Deadly Silence - Didn't care for this game either. I actually thought it sucked. I know the DS isn't known for the graphics, but I thought these graphics were terrible. And it just gets boring real fast.
**
Top Spin 2 - I bought Top Spin 3 because I loved the set-up for Top Spin 2. The only problem (well, HUGE problem) was the frame-rate. It was absolutely horrible and almost non-playable. I heard Top Spin 3 fixed this, which is why I bought it (have yet to play it though).
**
Rafa Nadal Tennis - Better than Top Spin 2, but still not great. No mini games makes this boring once you've beaten campaign mode. And the touch screen serving is nearly impossible to do.
Lego Star Wars: The Complete Saga - Heard the first one sucked, but this one is loads of fun. It takes a while to beat which makes it pretty worthy. Fun and the game can be pretty funny at times.
*
Crash of the Titans - A pretty fun game! It's a little too simple, but is still really fun. I'm glad I didn't buy it because the game doesn't take long to beat.
*
Legend of Spyro: The Eternal Night - Poor Spyro, I guess I'll be looking for your next game for the DS. This game, sadly, sucked. The gameplay was awkward, story was stupid, and horrible camera angles.
**
Mega Man ZX - Very fun game, but has the same problem as others: once you beat the game, there's not much to do with it.
Mega Man ZX: Advent - Although it fixes up a few flaws from the first, I actually think this is worse. It's far too complicated and doesn't hold your attention at all. About to return it.
New Super Mario Bros. - A little too easy but very fun and addicting. Has a few minigames that keep your interest. One of my favorites for the DS.
Mario Party - One of the better Mario Party games and really fun. I love the multi-player option (where only one person needs a game card), which makes this game a keeper.
*
Need for Speed: ProStreet - Didn't really care for this game at all. There's been a few entries of this game in the DS, but still has a lot to improve on. Pretty stupid.
Guitar Hero: On Tour - It's Guitar Hero on the go! Really fun but you can get hand cramps from time-to-time. Still really fun though.
So yeah, there's probably a few more I've played but this is about it. Lol, hope I shared my opinion well and I definitely plan on buying more DS games in the feature