I will admit, I don't feel that there is really
that much of a vast amount of slice of life shows myself or at least if I compared all the slice-of-life shows
I heard of or seen to every other anime show I've seen in my life. That being said, since you did mention that you've been watching anime for nearly a year now, I think you've started getting into anime in the middle of what I believe to be a recent "trend." I mean I got into anime since the late 90s during the Toonami/Pokemon era and what-not and back then there wasn't a vast amount of slice of life shows and I think the same concept could apply for those that got into anime in the early-mid 90s, or the mid-late 80s or something.
Now I don't think many of us fans from any one of those time periods hate slice of life shows neccesarily. It's just that the stuff that got us into anime back then probably
wasn't slice-of-life. It wasn't those types of shows that got us hooked into exploring more and more anime in the first place. It was other shows like Gundam, Akira, studio Ghibli films, Dragon Ball Z, Robotech, Cowboy Bebop, Yu Yu Hakusho, etc. So as fans from back then looking at anime in 2010 and witnessing K-ON, Lucky Star, or even many, many shows featuring girls or even boys in school uniforms with supposedly appealing personalities will make us think, "really?!
This is how people are getting into anime now? What happened to you in the past several years Japan?"
Now I don't hate slice-of-life myself. I actually like K-ON. It's not like making me love anime like I did all over again, but I like it. The problem is it feels like a trend to me and if I'm gonna watch slice-of-life shows, I can only watch one at a time. And it is a trend when you think about it. For example, once Lucky Star ended beyond the OVA, it I don't recalling reading people talk much about it on the internet anymore. Actually while I did give my lengthy answer, an anime script writer named Dai Sato actually expresses what bothered
him about slice of life or what he likes to call "atmospheric shows" flooding anime and there not being enough attention in Japan for the in-depth type of shows with strong messages behind the story or "difficult shows" as he labels it. He doesn't hate slice-of life or anything, he just feels there's not enough love for the "difficult type" of shows.
As a storywriter, Sato had a big axe to grind about the place of the story in Japanese anime. He complained that his works are labeled “difficult-type” (muzukashii-kei), something like the opposite of “atmosphere type” (kuuki-kei) anime. The latter is the type where nothing happens, or there is no significant plot, narrative or development. They tend to focus on cute characters and be very popular with moe fans. Sato said guys like him get no work, even as “Hollywood rips off our ideas.”
He did not say that he disliked “atmosphere-type” works like “K-On!” – rather he likes the incredible designs. He also did not criticize fan service, because, just as many Japanese film directors came from the “pink movie” industry, many animators are coming from a background in erotic material (doujinshi, eroge or ero-anime/manga). Sexual desire is part of the creative drive. But he sees them as moving towards characters and wasting time seeing just how nice they can make the images and movements look. This undermines the special anime-like movements, the visual vocabulary, that came out limited TV anime in the 1970s. There is also the issue of dumbing anime down.
“No one wants to hear about NEET [the unemployed],” Sato said. “They’d rather watch a group of high school girls in a band asking, ‘How do I play this note?’” By this point, he was livid and practically spitting in disgust at these fans who “luv anime” (anime daichuki). “If we are always escaping from reality and real problems, when will we face them?”
I hope what I said makes sense.