something rarely explored, what about romhacks that don't really alter the game, but makes the game feel more definitive by fixing various bugs and adding a new feature or two.
Megaman X3 Zero Project
Adding Zero as a fully playable character as well as various additions Zero related, it's like the original X3 is now moot
http://www.romhacking.net/hacks/888/Castlevania 2 retranslated with map
This has been featured before, fixes everything that hindered the original
http://www.romhacking.net/hacks/1032/Pokemon Liquid Crystal
This is cheating, yes. but this is Pokemon Crystal for the GBA with more, relive your gen 2 memories on GBA (also GBA emulators are highly portable, pokemon on PSP? yep.)
http://pokemonliquidcrystal.com/Sonic 3 Complete
the FULL Sonic 3 & Knuckles experience with tons of options including PC and Genesis music, Original Stage order, and many more.
http://info.sonicretro.org/Sonic_3_Complete_(hack)These are some ideas that could work...
Castlevania 64 + LoD, Free camera to D-pad.
will fix many issues, while not N64 pad friendly, but very emulator friendly
what are some of the other other Game+ Romhacks my fellow dungeonites can share?
What are some that can be great?