Recently I have had more contact with homosexuals than before and have thought a lot about homosexuals I have known and about past acquaintances I now suspect are gay. I've tried to pinpoint their commonalities and psychological peculiarities compared to heterosexual men or women, particularly those of the same socionic type.
My first observation is that in every case I find it difficult to type these people. In addition to their socionic type there is something else that appears to "cloud" the type (actually, my idea of the type). For instance, a gay LSE might talk about and express his feelings in a way that makes me suspect he's actually an ethical type. Or a gay SLE might lack the male dominance and seem more passive or even insecure than is generally typical of the type. These are just some possibilities. In most cases I still can't identify the types for sure.
I've found that in some cases it helps to think of the gay man as a woman, and then understanding his personality becomes easier. Likewise for lesbians.
Another thing I don't understand is how intertype compatibility plays out between homosexuals. I'm used to seeing heterosexual couples where masculine men choose feminine women or somewhat effeminate men are with somewhat tomboyish or "manly" women. I don't understand the attraction between two men who both appear effeminate. Perhaps it is more common for one partner to be more masculine and the other more feminine.
I also don't know if there is a correlation between socionic type and the tendency to take a masculine or feminine role in homosexual relationships. It is slightly tempting to hypothesize that logical types gravitate towards a masculine role and ethical types towards a feminine role, but I suspect the correlation, like always, is not neat.
Among people of a single gender and type I find a fairly wide range of masculinity, femininity and other characteristics. It's not impossible to imagine, for instance, an effeminate ILE with a gay partner who is a masculine SEI. Presumably effemininity among males has only a partial, very far from absolute correlation with homosexuality, and sexual preference is determined by something other than dosages of testosterone and estrogen during prenatal development.
I invite people with more experience and knowledge to share their observations and ideas.