Thank you for your answers. :) I'm playing with a gamepad right now on the PC. (I have the 360 PC controller) I like the gamepad controls but I can see it getting cumbersome once you get in the higher levels and need that precise movement that the mouse and keyboard offers but I might be wrong about that.
I've been end game raiding for the past 5 months or so with a static group in the hardest content the game has to offer and at least half of our group plays on PS4 with pads. The game is easily playable on a pad don't fret.
@superfusion: I mean, it really just comes down to what you want to play on both versions are fine. The PC version obviously offers slightly better visuals and the ability to use things like parsers and other plugins that the PS4 won't have. Also do note that you'll want a keyboard of some sort for the PS4 version if you decide to play on that. The PS4 version is comparable to the PC version on High settings.
@hassun: I think that is honestly the way games are going to go in the future. Not for awhile mind you but I think that is the eventual summit that the industry will reach. At least in the AAA games space.