I'm an Asian living in America and to truly conform to the stereotype, I used to bottom in my 20s. The experience was OK, never great. Physically it mostly hurt and was sometimes pleasurable. Mentally it was more fun being a bottom. But things changed the moment I discovered how pleasurable it was to top bareback. It was like "I never got the memo on this." The excitement, the fear, the nerves all melted into an unforgettable experience. Since then I became truly versatile leaning toward topping more (with or without condoms) now that I'm in my 30s.
But I can't be both top and bottom with the same person in the same setting. Only one thing at a time, as if the moment I see or talk to a guy, a switch has been turned on, dependent on how he looks and acts.
I'm a small guy (5'3" 110 lbs) so most of the time people naturally assume that I'm a bottom, even though I'm straight acting. I tend to bottom for guys who are taller and bigger than me, which most of American guys are, unless I travel outside the US and to Asian countries. There, with Asian guys who are either the same size as me or smaller, I feel much more comfortable being a top.
Sometimes I can't decide what I like more. Am I just schizophrenic when it comes to sex?