it is one of the best countries to visit and so much for tourists.pattaya is a must for night life .then fron bangkok you can travel to phuket and from there visit phi phi islands. And from there you can go to krabi or from bangkok whichever you prefer
its an experience you can never forget.this is the minimum you can do and to see thailand properly u may need two months
or find a friendly girl and get hooked which is quite easy as the people there are one of the best and friendliest in the world.