I found the shower attendants to be slightly annoying with the repeated "anything else you need?" - question, as pointed out by others before. The ventilation also is indeed a problem - although in fairness, I must say that I rarely come across really well ventilated shower rooms in lounges.
The one thing I really do not like about AM is the toilet attendants - on more than one occassion, they insisted on operating the soap dispenser bottle for me and giving me hand towels while attempting small talk (the "where are you from?" variety). Might be that this is the level of service expected in Qatar, but it feels so "me master, you slave" - cant stand that.