I haven't really been a gamer since about 2008, got so busy with work I dropped it. I was always more of a PC person though, I built my own going back to before Pentium came out. Co-workers got me hooked on Half-Life Deathmatch and Team Fortress around 1999, and I started buying more games as I went. I did end up picking up the consoles as they came out, PS2 XBox etc. Plenty of great games on the consoles, I was huge into Gran Turismo and some other console games.
Overall though, I would go with PC just for the keyboard and mouse. Generally if a game is multi-platform the PC version is the way to go. Usually better graphics on PC too. You do have to keep up with system maintenance though, adding parts as time goes on. I may be building a new PC soon, see if any of the current games hold my interest. Last computer part I bought was an Nvidia Geforce 8800GTS, so it's been a while.