yeah I will get to it one day when I feel like I can make decent progress on it.
Air Gear and Saiki K are two of my favs that aren't perhaps as well known, besides them some classics that are also favs would be DB, Code Geass, YGO, HxH, Cowboy Bebop & ofc Naruto. OPM that you mentioned is probably up there for me too. Tbh there's been a lot great recently too, but I feel like the dust hasn't settled on some of them yet for me to brand them a favourite or not. Often when I look back and remember how a series made me feel is when I get a kinda "true"/final verdict, if that makes sense, so I can be really enjoying a current a series but still feel it's too early to be a fav haha. So maybe some more recent/airing series could one day be new favs for me too!