I have tried to read everything there is to read about XMV and people's opinions about that, and coming to the forums this late, it is not possible
On the other hand, I am very curious how I rank against others on a map, but I guess I either get too intimidated or too sure about myself. I think that I try to start every match giving the best I can, no matter what ER's there are against me. Maybe, just maybe I'd like to see only the ER and not the number of games played. If there is someone with 10k or more, I might think there's someone I don't want to go up against, but then again, everybody has bad days, so I just might take a shot at it (pun intended)
I do know that I don't like the idea of building your strategy based on the info XVM gives, because not everybody uses that. It imbalances situations a bit, I think. Either everybody should see the info or nobody. Just go for the best performance you can give and that's it. Maybe if this was more like eSports, then I guess XMV would be mandatory for every participant, but now? Teamplay is non-existent as it is, few XVM users stand out, either appearing overly better than rest of the team or actually being much better.
At first I started to keep an eye on my W/R, but now I mainly concentrate on my avg/exp. It is on the rise so I guess I am getting better at this game. For me, the stats are there just for that, letting me know I am doing better than I was doing the day before.
I hope I just didn't repeat stuff that's been already said, if that would be the case, my post seems kinda pointless.