I had this happen with a lot of older games. Diablo 2 and Starcraft come to mind. I used to be heavily into these two games.

Sometimes I'll get strong urges to play the hell out of them..but when I pop em in and start em up it just isn't the same as it used to be, and they're both boring as hell now.

Another one would be Paper Boy for NES..man I used to love that game. I went to Bookmans and spent 45 dollars on an original NES cartridge. Brought it home, played it twice in about a year..