I actually don't mind mcgregor at all, I personally dont think he's particulary amazing but definitely believe he can be if he live's up to his own talk. I actually find him funny and i believe he bring's alot of what the sport need's. People dont talk enough smack about their opponents for an organization thats about beating the crap out of eachother, i admit i believe it's better to be respectful but being over the top and talking shit can go a long way if you can back it up.
His trollish fans however, are what i believe turns alot of the hardcore people off to him, stick around long enough and you're bound to run into 2-3 troll thread's (sometimes started by the same person.) posting the Same over the top stuff he does in an attempt to seem clever/troll. This combined with him doing it just seem's to be a bit too much for people on here, hence his diehard haters(who really probably think he's got potential and just want him to earn his dues and can't take the edgy troll fans.)
But yeah mcgregor himself is ok and generally beneficial to UFC. like it or not.