I use the ring tones that come with the phone. A guitar song for my husband, an old fashioned ring for most incoming calls, whatever the phone came with.
I tried to load a few tones from our computer, but I am hopeless with technology, and even my kids couldn't get the phone to take the tones properly. I had a Pikacu doing something that sounded like an orgasm for a while, but it drove me nuts, so I deleted it. It was funny, when it rang when I was out in public.
Peek....peek...P EEK...PEEK-AAAHHHH-CHO OOOOOOOOOOOOOOOOOOOO!! !!!!!!"