Story 10/10
If you started watching K-on expecting an actual plot, then it is you who is lacking, not the anime. That's like going to a Michael Bay film and expecting to get a nuanced classical drama. It is a 10/10 story, precisely because there is no story or plot (or rather a minimal one at that). You can pick it up at any episode and follow along. Sometimes, you just want to kick off your shoes, cozy up under a blanket and watch a cute little anime, you know? And I cannot overstate the importance of not having any romantic aspect in this show. Seriously, if they had done that, it would've been a 2/10 show for me. Moving on...
Character 10/10 & Art 10/10
Imagine the cutest and clumsiest little dog you can think of. Now turn that dog into a human. You have Hirasawa Yui.
How the hell can something be this cute! Props to KyoAni. With Clannad, Hyouka and Inu Yasha, they were already up high in my list. But now, with K-on, yeah... Yui's character and interaction designer, or maybe it was the manga artist who did this in the first place, you sir, are simply amazing. If it were up to me, r/aww would have nothing but K-on gifs and screenshots.
Watching the Hirasawa sisters interact is simply, healing. Hearing Yui say "Ui" is panacea.
They rank pretty high up in my top conversational duo list, after Araragi/Senjougahara, and Holo/Lawrence, and Hachiman/Haruno and Araragi/Shinobu, and Araragi/Tsuki, and... well, the Monogatari series is cheating. But you get the idea.
Not just that, Yui just friggin lights up any and every scene that she is in. An MC that actually grabs and shines in every possible moment? It's Yui. No one can compare here. She 'makes' the show. And keep in mind, I'm not taking anything away from the other characters here. They're all so friggin adorable. It's just that Yui ties everything together.
Sound 8/10
All you voice actors, you simply could not have done a better job. But for a music oriented anime, it could've had some better OST.
And finally, this anime might not be for everyone. People tend to expect different things from different shows for different reasons at different times. I was just frustrated by a couple of anime that I watched recently (Noragami, looking at you) and wanted to simply watch something where nothing happens. I'm really really glad I picked up K-On. Anyway, if you think, 'fun things are fun', you know what to do.
Say, "Moe Moe Kyuuun" and give in to happiness.
