[quote name='flameofdoom666']My first playthrough- I couldn't put it down. Replayability... this didn't exist probably because it was much easier then Super Mario Bros. 3 and Super Mario World.[/QUOTE]
i definitely agree with you there. it also feels like (can't say for sure) it's a shorter game in general -- as in the length of the levels combined with certain power-ups... i don't know, i just feel like i gunned thru that game in a day or two (including gathering all the coins) and felt like there wasn't anything left to see. in fact, a lot of the "secrets" and extras often felt forced and obvious, like the designers didn't want you to pass them up, which of course defeats the purpose. i still think it's expertly-crafted and a wonderful game, but the replayability certainly doesn't match up to almost anything in the 2D Mario series. on a slightly related note, i also thoroughly enjoyed Super Mario Galaxy, and i'm looking forward to playing thru it a second time, once my GS "hand-picked" copy gets here.