Too often, the gay population is its own worst enemy, as far as perception goes.
Earlier this year, I joined a gay men's chorus here, but left after a couple of months. Basically, if you didn't use "Girl!" before you started a sentence, alluded to your promiscuity, or claimed to drink excessively, you were pretty much ignored.
I like gay men. Heck, I LOVE gay men, but as individuals, not because there is some veneration of Madonna or Gaga, or whatever.
When I read the term "straight-acting" in a gay-man's self-description, I just write is off to both English illiteracy and cultural and sociological ignorance. With the prevalence of all three, it is usually not worth the effort to figure out which is the culprit.
As for deeming the user of the phrase to be self-loathing, never. It is simply a product of being inarticulate, and cues the reader to think masculine, average, or closeted. As for what the individual may be, I could like all three, but would hope for a world in which men did not feel the need to be underground.
We should leave the loathing to the gay-bashers; there's really quite enough for the market's needs out there.