I enjoyed it myself as well, I thought all the characters were fantastic, and it was great they managed to introduce a team that the audience had no previous knowledge of (unlike Avengers) and still give the characters depth.
The only problem I had, is the plot is very similar to Thor: The Dark World. It is like the Infinity Gems are holding the movies back (aside from The Winter Soldier, which it was absent until the after credits). Both movies include a forgettable villain trying to get a world destroying weapon, and the good guys have to keep it from them / stop them from using it (with much more interesting subplots in my opinion). I honestly hope the other movies steer away from this, but it seems Marvel is continually building to the Avengers / Guardians / Others vs Thanos and the Infinity Gauntlet for Avengers 3, so they are going to keep popping up.