Aha, I don't know which season I like more --I like both! First season was great with set up, and second season was really interesting in how...uh...
Spoiler
...how they expanded the character relationships and character development. I enjoyed the portrayal of all the characters more here, but I still appreciate how they were introduced in season one.
Steve and Dustin's brotherly relationship was very sweet though, as well as Mike and El's reunion, and Hopper and El's familial relationship.
These kids are such amazing actors!!!
Also, the DVD collection I bought from Target came in today! It came with a Stranger Things poster of the "demogorgon", and it's VHS appearance is pretty nifty-looking. However, there are no bonus features included and you can't skip commercials, so if anyone's interested in it, those are the obvious downsides.