Most Helpful Guy
Living about 40 miles from San Francisco myself, I'm pretty sure Atlanta isn't the "gay capitol". LOL.
The truth is that all large cities have high gay populations, because few gay people like to live in rural areas, because it's hard to be around other gays that way. But while there are tons of gays in San Francisco, straight guys still outnumber them, and that would be true in Atlanta or Nashville or any other big city.
I recommend you research at LEAST 5 big cities you think you might be interested in. Take at least several weeks to do so, and ask lots of questions, and research the job market, the real estate costs, transportation, taxes, and so on. Try to narrow your list down to 2-3, and then save some money and visit those cities for a weekend each. Yeah, it might take you 6 months or more to complete the process, but you'll be in a MUCH better place to make your decision that way.