I think he means will it f*** up the account if you just carry on using it as a normal bank account....answer no as long as you have the stipulated funds in there >800k >400k etc at all times. I actually haven't used the account since I put the 800k in it!
Travel a bit first to places you like the look of. I wouldn't wanna live in bkk if not working. Pattaya is good for other expats and stuff to do but too much temptation so gotta be careful....
Can get retirement visa in Thailand or start process in uk first pros and cons.
Get some hobbies which will involve meeting people - golf even pool as lots of societies / leagues in pattaya anyhow....