I think Legends of Tomorrow is super fun. I thought the first season was just kind of, I dunno, it was sort of meh - it wasn't Arrow meh, but it was meh-ish.
But this season is just the right amount of levity and dorkiness, with a splash of action and drama. It doesn't delve into the type of soap opera you see on the other three Berlanti verse shows (not really, especially now that Hawkfemale and Hawkbot are gone) and the characters are kind of fun cliches that seem like they're having fun playing those roles.
So, it's a nice little brainless show in a fun vein, that I would liken to.. oh, something like Big Hero 6.
Flash is more or less following the same template, but, it remains entertaining.
Arrow is much improved from last season, but I still find the show a bit of a dreary watch as we race from personal drama to personal drama, to mystery to cliffhanger to personal drama to voice modifier.
Supergirl is also much improved - the pilot for that show was awful but the lead, I forget her name ... let's just call her Supergirl actress ... Supergirl actress is very likeable and that carries it quite far. It also helps that they're pulling out the a-list Superman villains like Metallo, Cyborg Superman, Parasite along with an already strong cast.
Have I missed something? Maybe Gotham. I feel like Gotham should be included - it's a weird show, and it isn't anywhere near as fun as the berlanti stuff, but the DC villains are fairly fun and the relationship between Penguin and Nygma is the best soap opera on TV.