Welcome to the board Rich
A lot of guys I know prefer BKK to Pattaya and most of the guys here prefer Pattaya to BKK. Personally I enjoy both places so I'd recommend giving each a try and making up your own mind. Pattaya certainly has the edge in terms of quantity (and by a long way too) although when I was last over few weeks back I'd say BKK had the better quality.
As others have said, if you give an idea of what your budget is then you'll get plenty of recommendations as to where to stay.