There's a reason keybindings exist.
I'm... not sure what you mean. I still find an SNES controller a hell of a lot easier to use with SNES games than a keyboard. Plus, even if you use keybindings, sometimes it's hard to press all the keys you want at the same time comfortably, because the two input devices simply aren't designed the same at all.
Actually the Snes is easy, its when you get to the PS1 and the N64 emulators. Where it has more then one controller method in some games...
With the snes i used the arrow keys as movements and s,x,a,z for a,b,y,x and q and w for L and R...
Case in point: There are some games where I'd want to be moving in a certain direction while holding up to four of those other buttons down at the same time. Not exactly easy!
Of course, it depends on the game. A Final Fantasy game? No problem. A game like Battletoads or Mega Man X or Super Metroid? Too frustrating.
\\Has cleared games like Battletoads via Emulator cause he could never find it again when he owned a Snes\\
Seriously if ya can't use an emulator and multiple controls don't bother with them. Stay away if you find it difficult, Consoles are for people that want to play games in a more casual area, while PCs are dedicated areas...
Its all down to personal preference. Not controllers or anything like that. Example;
I really hate X-Box controllers, too clunky for me, PS2 had more slimmer and more comfortable controllers. I Owned a PSP, found that very comfortable but at the same time the Thumbstick in a weird location, which caused my thumb to cramp after prolonged use, especially when playing Monster Hunter, ended up getting to the point where a Big hunt would take only 5mins from Start to finish and me putting it down to prevent it, I later found using a DS hard cause it was small and tiny which made my hands cramp up after prolonged use but when I upgraded to a 3DS it seemed more comfortable due to its size, despite it being only like 5 or so mil bigger. You (or anyone else) might play X-Box like mad folk and find the controller fitting and easy to use. Or even the N64's controls perfect, or heck any FPS on consoles great and shit where I stick to PC for them...
So I will say it again...
Its all down to personal preference.