Most pros I've met have been really nice people, down with talking and skating with whoever etc - a much shorter list would be those who are dicks (but this isn't the place for that) - but the Barca locals can give a good starter list with some names that surprised me!
Some standouts for me are anyone who hails / skates in bristol UK (Danny Wainwright etc) - such a friendly scene.
A lot of Aussie skaters - Renton Millar etc - are down to earth nice guys
Pat Duffy - came up and started randomly talking to me at Marseilles when I lived there, nice guy and it stoked me out because, well, he's Pat Duffy and was so friendly
Javier Sacriemento (sp) - friendly as
I agree with whoever mentioned Morgan Campbell, and will add that most UK skaters on UK board companies are pure skate rats just because they don't make a lot of $ in England - so are totally down to earth
Oh I could go on and on!! Fortunately there are a *lot* of nice guys out there!