Being gay should not be about an act. I don't understand people (gay or straight) who go out of their way to pretend they're someone that they're not. Why don't they just be themselves?
"Straight-acting" is an unfortunate term that refers to homosexual or bisexual men that simply don't act in a stereotypical "gay" way. They're not necessarily going out of their way to act that way. That's how the majority of guys who like guys are. They are being themselves.