Honestly, on here at least, you're not going to have a good time camming with the person unless you have a good time talking to the person regardless. Unless you're already on good terms, chances of you getting to stripping-naked-and-watching-each-other terms are very close to zero.
I'll use the example of when I chatted with Katt (she said it's okay for me to post this). I was on the LPSG Video Chat, saw Katt and looked at her profile. She's an incredibly beautiful woman, and so I looked through her interests, hobbies and whatnot to get to know her more. It turns out that she listed Japan as one of her interests.
I lived in Japan for a year, and learned the language and had an excellent time. So I had a good, lengthy conversation with her about learning the language, what living over there was like, and so on and so forth. After that, it seemed almost completely out of place to ask her if she'd be interested in seeing my cock. However, when I asked, she replied, with great sarcasm, that the only reason she came to this site was just to talk about studying foreign languages.
So I took off my clothes and had an excellent time with her, as she lifted up her shirt and bra.
So yeah, it's important to have a good friendship, at LEAST, with the person with whom you want to cam.
I think a huge problem is guys just going straight for sex, without any previous context. Even if I WAS gay, I still think I'd turn down all of the private chats I received from guys while I was in chat. A stranger coming up to you and asking where you live isn't a turn on, really.