Well, I guess I'll get on the favorite train. These choices are kind of hard since my gaming experience is limited and there are alot of games which I consider #1. Also nostalgia gets in the way XD:
1. WWE Smackdown vs. Raw 2007:
Back when I was a kid, I used to be a HUGE wrestling fan. Enough to where I picked up their games. This was the first one I had and was the most nostalgic to me. So it's number 1 for nostalgic purposes.
2. Spyro 2: Ripto's Rage:
Now this game is what mainly got me hooked into Video Games. Going through the portals made you feel emersed in the world and unlocking more worlds gave you a sense of accomplish. My mom and I actually fought over the game several times XD.
3. Crash Bandicoot 3 Warped:
Good ol' Crash. The same reason Spyro captivated me also got me emersed into Crash. The collectibles in the game were fun to collect and riding on the tiger through a japanese setting was fun as heck. I'm not going to lie, I always thought Crash's nipples and bellybutton were his face when I was little XD. A little embarrassing, I know XD.
4. Newer Super Mario Bros. Wii:
Now this may seem unfamiliar as its not an official Nintendo title. Its a mod of NSMBW made by the Newer Team. I actually followed the project when it was in development on their forums as it looked promising. The game was so good, I feel like it has surpassed the rank Super Mario Bros. 3 had on my list. It consists of 128 levels with a returning power-up, new enemies, bosses, worlds and etc. It is massive in scale and overhauls the NSMBW engine. The filesystem for the game is even different. It's impressive what these people did.
5. Super Mario Bros. 3:
Now this is the first Mario game I've ever played, so it is still dearly close to my heart. I originally played it on my Aunt's Wii and I feel in love with it. Afterward, I found the GBA port and played that all the time on my DS. It was also the first game I completed 100%.
6. Super Mario 64 DS:
This is actually the first 3D Mario game I've ever played. I spent a plenty amount of time exploring the world and playing a large amount of the multiplayer mode was fun.
7. Super Smash Bros. 4 and Project M
This may be cheating a little since its two games. But I feel they come so close that they are at the same rank. Project M 3.0 was one of the reasons I started following Smash and getting into the series. I also put an extensive amount of hours into the game. It was mostly because of the Smash 4 Hype at the time, but I still play it very often. Now for Smash 4, everything about the game I feel is hype. The Music, characters, stages all have excitement to them.
That's pretty much it. I got alot of games I like, but I'm too lazy to write about 3 more
. Its just my opinions XD.