From my own experience I would disagree with your gut.
I've only had 1 bad experience with a Brazilian and that was attitude related rather than the service itself, which cannot be said for Roms. Some of my favourite punts have been with Brazilian SPs, and the last two girls I reviewed were both from there. I used to think a blonde EE was what I wanted, but I have a better time with Brazilian girls.
They are all notorious for having menus filled with extras which makes them seem cheaper initially but adds up, and English is often a problem. It's impossible to recommend one in Nottingham as they don't stay, they move around a lot, so it feels like pot luck because they don't tend to get reviewed all that much either. But I've found that they're generally fit, sexy, and enthusiast.
Depends on what you're looking for, but worth trying a girl you like the pictures of and their like list reflects what you want (bearing in mind that things like kissing, OWO and CIM will almost definitely be extras) to find out for yourself.