>>11925215 (OP)
1.) Super Mario Bros.: The original game. There is really no other way to play it other than the original. Any redux patch change too much in my opinion.
2.) Super Mario Bros. 2 (Japan) / Super Mario Bros. 2: The Lost Levels: Here is a patch to remove the "play the game eight times in a row to get the last set of levels" requirement:
https://www.romhacking.net/hacks/7954/. Note that the SMAS version gets rid of this requirement if you prefer to play the game that way.
3.) Super Mario Bros. 2 (USA) / Super Mario USA: Again, no patches required. The game is good as is. The GBA version is worth playing afterwards, World 5's boss is Robo-Birdo. However, if you do play that version, there are patches to restore the SNES color palette and remove the constant voices.
4.) Super Mario Bros. 3: Apply this patch to get rid of that annoying flicker that you'll see on the NES version's UI:
https://www.romhacking.net/hacks/7713/. I also like to sometimes play it with Super Mario Bros. 3+ to play as Luigi, Toad, and Peach. These are different hacks, but Mario Adventure, Mario Adventure 3, and Super Mario Bros. 3Mix are great hacks. To play the e-Reader levels, download an e-Shop ROM of Super Mario Advance 4. Palette restoration and voice removal are compatible with this version.
5.) Super Mario World: Also doesn't have a definitive redux hack. I would just play the vanilla SNES version then play the GBA version with the restored SNES palette and SMAS-SMW Luigi sprites and voice removal.
6.) Super Mario World 2: Yoshi's Island: The definitive patch, removes the crying, hidden red coins, and a few annoying sound effects. Ignore purist fags on this one:
https://www.romhacking.net/hacks/3945/. The GBA version has a few new levels.
7.) Super Mario Land 1 & 2: Both have colorization/DX hacks that are worth using.
8.) Super Mario 64: For the original game with QOL improvements, use Super Mario 64 Plus by download SM64Builder2 and downloading it from the launcher.