All the characters are adorable in one way or another, and the comedy of the series will not get old.
Beign also an anime about music (Even though they don't really focus too much into it), the music is also amazing, the background music is so well made that it will make you feel what the situation is like. Sad moments will have music that will also make you feel sad, and the funny moments will have funny music and so on.
The few downsides to this anime is the animation, despite it's cute art style, it's somewhat poorly animated for the first few episodes, and spotting asymmetrical eyes is not a rarity, as it does happen somewhat often (However, they are not really noticeable unless you look at it closely).
It really makes me sad how there's never gonna be a 3rd Season.
K-ON! is definitely worth watching, the story isn't really the most serious, but the comedy justifies it. And the few moments it gets serious, it just somehow catches you in the mood.
This anime, for me, is perfect.
