I like to look for people with the lopsided win/loss records (like 8000/400) b/c generally (disregarded the boosters) those are the better players... I want to get better by playing them. Not worse by playing not so good players.
LOL. No, they're not, not by a long shot. A few I played like that are legit, but most are not. They hunt noobs. Then I've had people with 1/10 kick my ass, likely b/c they are just a new account. My account is lopsided the other way because I do try to find people better, including people from this site. Look at my vids and see how often I lose to TYMers, but I don't mind b/c I'm learning.
I only look at records to get an idea about total number of games played; I try to look for people with 1000 or more typically. I also don't refuse a challenge. If someone with 0/0 thinks they can beat me, go for it. Again, it may just be a new account for them.