One of the most dominant aspects of life in tropical and subtropical regions is the climate. Tropical regions are located along the equator, the part of the Earth that is closest to the sun; because these regions are closer to the sun, the resulting temperatures are very hot. Sub-tropical regions are not as close to the equator, but can still reach very high temperatures during the summer, like southern Texas, for example. Tropical and sub-tropical regions are marked by extremely hot summers, and depending on the continent or area, can also be extremely humid and dense feeling.
Benefits of living in tropical or subtropical regions include mild winters and having a potentially much longer growing season, but negative aspects of these regions would definitely include the stifling heat and humidity as well as the danger of mosquitos and mosquito-transmitted diseases like malaria or West Nile.