Well, I personally have had all good AK runs except for a few(just one actually) where people just left without a word. My first 3-4 runs were horrible.. I brought the team down, one even made us ran out of time. But from then onwards I got really used to it and lots of friendly people just taught each other whenever there's someone new. Although, 75% of the time I went with all japanese.. I have no idea why if I queued for all languages there isn't a mix of people and it's either all english or all japanese, lol.