Sailing the Blue Skies since 2001.
Super Mario Bros. 3 (NES, SNES through SM All-Stars, GBA, Wii VC)
Ah, the memories that I have for this classic. I will post what I commented on SMB3 with Neomega's Top NES feature...
This is the game that I probably know more than nearly any other game made (only a few others spring to mind - Mega Man 3, Mario 64, Zelda: OoT...). I played this so much that I had etched where every little secret was buried inside my head. I still know all three whistle locations, most of the White Mushroom House locations, where most the hidden suits are, where to best utilize the infinite 1-Up tricks (1-2 Goombas, Lv. 2 fortress on the Dry Bones, 3-9 Bullet Bills with a shell...), and conquer the trickiest stages. And at the time, when I was about 9 or 10 years old, I was going "Wow, so this is what gaming can be."
The rock solid gameplay, along with fairly good NES graphics and sound, made this title become one of the favorites on several gamer's lists. The uniqueness of the Raccoon/Tanooki tail's flying abilities, the Frog Suit's swimming, the Hammer Bros. Suit letting you become one of the enemies for a while (and being able to deflect fireballs), being able to pick up shells and so much more than what the original Super Mario Bros. had to offer, plus enough levels and side quests (Go for the Star on the slots!) to leave just about anyone happy, and you'll see why Super Mario Bros. 3 is our choice for the greatest NES game of all time. One of Nintendo's finest hours, and certainly one of gaming's greats.