1.) LoL's Lore - Yes. I love the lore and how they're expanding Runeterra slowly. Lots of places to discover and immerse ourselves.
2.) Summoners - No, sadly the idea of these "Summoners" controlling near-godlike beings or people with positions (Jarvan, Swain, etc) with mere ease is something I'm not fond of (like the initial cinematic trailer of League of Legends). Good thing Riot thinks the same thing.
3.) The Institute of War - I love the Institute of War, serving sort of the neutral ground from all city-states and a place where Champions can train themselves, etc.
4.) Champion Bio - Don't care, its nice to read a champion's bio every now and then to ignite that dying spark. Regardless of source (wiki, official website, in-game client), I'd still read it.
4.) Last Part - I somehow miss JoJ, it involves outsiders interacting with our champions, how they would react on things outside their domain as such. Sinful Succulence Morgana's Bakery Shop announed in JoJ, Blitzcrank's Dating Service, Shaco's Interview, Akali and Shen's Blood Moon Performance, Jarvan/LeBlanc vs Swain Fight at the Crystal Dominion - a lot of stuff that I really miss. Its like reading a Newspaper of Runeterra that gets you everytime.
So for my question to you guys regarding the same topic - "Do you miss Reflections" of our Champions whenever they get introduced into the Institute of War? I for one enjoy reading those Reflections.