Pattaya used to be the best but the negatives( extreme heat, stench, lengthy travel, bad exchange rate, increased drink/girl costs, girls always on phones, air pollution ) outweigh the positives. Medellin Colombia is the place to be 2020. The city can be intimidating if you speak no spanish and don't handle urban settings well but the place is dirt cheap with unbelievably beautiful chicas everywhere. City is much safer than you think, just be streetwise and cautious at night.