Project M. I can mod it in anyway I like with a large library of changes to choose from. It has Turbo mode, All-Star mode, Single Player Training mode; modern menu, changeable controls and multiple controller support, adjustable music and multiple music slots, a handful of difficult AI without being overpowered and cheap. Fairly balanced cast filled with above average abilities. Melee's competitive physics, so lots of options for viable playstyles. Glorious aesthetic and vibe that you can even alter and customize if you so choose. Strong and mostly non-****** scene. Thought provoking, mentally challenging, and technically demanding. Fun.
It's a Smash game by the players for the players. You can be competitive or casual as you wish. My only gripe I think is that it takes itself a bit too seriously maybe; looking at old Brawl videos, I felt a sense of levity and pasttime that I don't usually get from watching or playing Project M. Regardless it's a game I plan to play for a long time until the newest thing more appropriate to the times comes to properly succeed it, whatever that may be.
I may get into Brawl Minus and Smash 2 in the meantime.