After unlocking everything in Mario Kart: Double Dash!!, I was inspired to finish Story Mode in F-Zero GX. I did. And with all cups unearthed and beaten on every difficulty--including Master--I think I have technically "beat" F-Zero GX.
I'm still going to try and unlock every staff ghost and go through Story mode on Hard mode, thereby finally completing my collection of avialible machine parts. I don't think I'm at the point where I actually want to beat the staff ghosts or go through Story Mode on Very Hard--but time will tell.
That's three for me.