I'm not a fan of slice of life anime. But I am a fan of battle shounen anime that have good slice of life moments whenever possible.
One of the best examples I know is Bleach. I love Keigo, I love Chizuru, and I love Chad who otherwise is an useless character. I love Karin (Yuzu not so much) and I love Isshin. I love their antics from the beginning of the series, and I wish we got more (that's why I don't like to skip Bleach fillers).
I love how in Kekkaishi, Yoshimori is more concerned about his cakes than about protecting Karasumori, which he mostly does out of his sense of guilt for having Tokine saving him as a kid and ending scarred for life. Also good school antics but the school cast is way shorter and appears much less than the one in Bleach or even the next example, a manga much shorter.
Another title I love, this one MOSTLY for the slice of life in it, is Buso Renkin by the same author of Rurouni Kenshin (yeah, THAT guy). I love the chemistry between Kazuki, Okakura, Daihama and the nerdy guy whose name I forgot now, and I also love Mahiro and Tokiko and Papillon.
I also like when they incorporate sports, like in Jujutsu Kaisen where they have that baseball game, or in Hunter X Hunter where there's Razor the single best antagonist slash event slash mini arc in all of the manga.
Tite Kubo likes to draw random stuff to open chapters and some of those random drawings gave birth to filler episodes, like the one where they're in the desert wearing turbains (became "Ichigo and the Magic Lamp") or the Halloween one. And I'm still waiting for the filler episode about the Olympics, if you know you know. But I hated when they just HAD TO insert a Hollow there (like in the beach episode) just for the sake of having some action. I liked the breaks — I liked the slice of life.
All this said, I could get interested in more straight slice of life anime or manga if they were shorter. One of my favorite anime in general, really like top ten or even top five, is Ghibli's Omoide Poroporo, that movie had me crying for most of the screen time and I almost dehydrated, it's so damn sweet and perfect. I gotta watch it again soon.