I guess I'm like most of the people who have posted so far. Minor annoyances to me, such as rude or innattentive staff, missing items in the room, bad maid service, or such, I just brush off. Everyone's going to have a bad day. If it doesn't affect me, or is a very minor issue to resolve (I need more towels/soap), I forget about it immediately.

More major things, like no hot water, doors that don't lock, loud neighbors, I wouldn't hesitate to call and give them a chance to fix.

When they've heard my complaint and ignored it, or tried multiple times to fix it, I get more firm. Not angry, but I tell them exactly what I want and what I expect: points, new room, to talk with the manager, whatever it is. They don't know me and don't know what makes me happy. I'll let them know, in a positive way.

I'd also talk to a manager about staff if it really became a problem. Most of the time I approach this as an opportunity for the manager to 'educate' the staff. I'm sure that almost all of the employees WANT to do a good job. I don't want to come across as "I-know-your-job-better-than-you-do", so I try and present things as calm and rational. And again, I tell them what I expect: "I would appreciate if you would talk to that employee and let them know that there are better ways of handling this issue, such as..."