favorite - (this is going to be a surprise) Street Fighter 2 Turbo. I have most Virtual Console games deemed as great, but in terms of gameplay, I played SF2T for hundreds of hours, while the other titles... Well, let's just say that I might have paid for about fifteen minutes of monthly gameplay (I'm looking at you, Adventure of Link).

Least favorite - Adventure of Link, altough I hated that game way before I got my Wii. It's only redeeming quality is the music, but the sidescrolling gameplay or the magic system are bullshit. What is even more bullshit is the way you pick up items - who the fuck thought that hitting items with the dagger/sword/whatever will make you pick them up? Try picking up a water bottle with a sword in real life, I guarantee it won't be pretty.