This is a major tourist destination which has reached a critical mass of tourists, despite having a pretty marginal beach. Some of the food served in street restaurants was absolutely amazing - and made my ears ring...
I stayed away from the commercial restaurants, as I figured they would tone down the spices too much.
Pattaya also has a pretty cool complex of temples at the top of the mountain, including a huge gold Buddha, and a large group of Confucious statues and shrines.
More markets too - lots of streets full of interesting things. Also, check out the 7-11!