All of my limited hobby experience have been CBJ, if i make the transition to providers that offer BBBJ what am I realistically exposing myself to?

The air...   I mean once you remove the 'C' then there is nothing between you and ... well.. everything.

lots of fun?

herpes.  The key is too wash up right away so even if she had herpes it cant get a foothold on you. Maybe even just do it in the shower?

Have anti bacterial wet naps or alcohol wipes for a nice cold sensation right afterwards

Here's some good info from TheLoveGoddess on the Erotic Highway board (see link below).