I too am PayPal-only. I've read stories of PayPal doing shady things, and I worked with their API at my last job and did not enjoy it. But as an actual user, both receiving and paying, I haven't had any problems yet. And there are PayPal developer forums, so at least when I was annoyed with their docs or with weirdness in their sandbox I wasn't alone.

I tried to have both PayPal and Google Checkout links on my site, but I got an email from Google informing me I have to be a non-profit to accept donations. Oh well.