New Super Mario Bros Wii. is my favorite, i like coming back to it. The way it plays on the big screen but still can be on like an old tv and looks just a little bit on the lower-side of quality, gives me good memories when playing it again. The original NSMB is a very close second though, first one i ever played (tbh the first game i remember playing aside from Minecraft and Terraria) and is the meat of the “New” era with a ton of odd gimmicks and stuff from SM64DS.