First of all, I'm not OP. I didn't start this thread.
Second of all, I use 3 players: Mplayer, VLC and Quicktime + perian depending on the situation. I am on a mac but I could care less about which is "better". Clearly both macs and pcs have pros and cons and it's a matter of choice. Why people nerd rage over it I don't know.
Finally, why the fuck would you care what program some stranger is using on his computer? Is it affecting your viewing enjoyment?
For the average user VLC is fine. It is incredibly shitty when it comes to overlapping subs but most of the time it does the job okay.