I found the perfect spot for selfies. It's a women's restroom at a place where I volunteer. It has a huge mirror over the sinks that goes from mid-thigh to almost the ceiling. The lighting is rather dim but very soft and even, so it's the most flattering light that I've ever encountered.
The two pictures below were taken at that spot. The left one was from a week ago, when I was wearing one of my best outfits (100% eBay, each piece being a lucky find bought from a different seller at a different time). The right was from two days ago (Friday). I was experimenting with eye make-up and went a little bit overboard; it looked ridiculous up-close but kind of nice from a distance.