In thirty years, I only just visited my first indy, and never used any agency. For me, is either civvies or AMPs. Get some mombod civvie whose husband won't eat them out or a college chick who just got dumped by some piece of shit narcissist or pussy, and you almost feel like you ought to be paying for it how awesome it can be.
AMPs for me are best, because it's a store, so you can be as anonymous as you like, there's no extra BS, unless you initiate (advice not to!). Just go in, play the "oh we missed you" game, get your groove on, enjoy the sweet loving GFE and ST, and hopefully the TM, then return to your regularly scheduled programming.
For indy, I feel like the chance of game of "your ad says you're thirty, and you're older than my mom", or "that picture is on polaroid isn't it?", or "dam you got some serious photoshop skills!". Or, the chance of "hi, this is my boyfriend and he's going to watch", or "hi, this is my boyfriend, he's going to rob and murder you," or "you don't care that I have a cock, right?". If you get it right, like my one indy experience, ok it's great and I am actively trying to find more. If you want to get other than a Chinese lady, at least in my area, either indy or agency is the way.