Although I'm not usually a fan of slapstick humour and would usually enjoy a witty wordster HM, I prefer Perez.
Firstly and most importantly because we don't have the latter, KH for example, is a huge disappointment in that department (poor vocab, no quick smart comebacks) and secondly because Perez is just so God darn random, I enjoy watching him just to see what the heck he is going to do next.