Project M is really good to.. alot better then brawl.
melee engine with brawl characters.
Melee and PM are where its at, smash 4 will probably be alright. But they will probably make a project M version of that to.
Once you learn how to play smash with the advanced techniques, the games evolves into a better experience.. It has plateaus that you reach over time.
For instance L cancelling, once you learn how to diminish the landing lag on ur air attacks, ur combo games speeds up... same for wavedashing once u learn that ur movement game and how you move around the stage starts to get alot better/faster.
I think these things are what makes smash, smash