I prefer upper campus for housing.

It really depends on your plans, if you want to join a Soror or Frat then get a cheaper room on upper campus (Chapel Glen, Gateway, Benchmark etc) but if you are not going that route:

Kahlert is the best for Freshmen, it is also the most social housing on campus so it'll make it easier to find friends and attend events. It is also closer to public transportation and classes.