Borderlands 2 is a very fun game. The artsyle is unique and fun, the gunplay is amazing and the different guns are well balanced and very unique. What's not to love? Well let's start of with the world. The artstyle itself is really cool and one of the main reasons why borderlands is so iconic. The characters and world building on the other hand are pretty lackluster. None of the characters (except for handsome jack) are any good at all. They either fall into the trap of being boring and stoic or really annoying. The single worst thing about this game though is the sound design. It's all just loud and full of screaming enemies. I found the optimal way to play this game (for me atleast) was to alt tab into spotify and put on some music. And as for the levels, I think they're pretty decent. They give you enough enemies and loot to keep you entertained even though the locations themself aren't anything special.
Overall I would reccomend this game even though there are plenty of flaws with it. All of the problems I listed are really annoying but the weapons and gun mechanics elevates it to something special.