I have always preferred playing the classic games as they were meant to be played. Some websites have already been mentioned (below) as far as homebrew and reproductions are concerned, but I was wondering if anyone has any other ideas or other hidden gems they would like to share. And if so, does anyone have any particular games to recommend?
http://www.nesreproductions.com/
www.retrousb.com
www.VideoGameKingdom.net
*edit made after some responses.