It's not meant to be exciting. It is a hard genre to explain the appeal of if I'm being honest. I'm a huge SoL fan myself, K-On, Kinmoza and Non Non Biyori are some of my favourite shows. They have really enjoyable, cute characters and are generally quite funny and entertaining to watch. They don't have huge stories or complex characters but they are just plain enjoyable. If a show is really good, you find yourself getting really attached to the characters to a point where you feel genuinely sad because the show ends. K-On is a prime example. The closest I've ever come to crying at any media is the end of K-On Season 2 because you feel like you've watched the characters and their friendship grow before your eyes and you become so attached that by the time it ends, it's almost like saying goodbye to friends, as sad as that sounds. The fact that these character's lives go on and you won't see any more of them is kind of heartbreaking. I was in your shoes once, I dismissed slice of life as boring. Then I tried it, and it's easily one of my favourite genres.