Yeah I did the same thing because just judging the artwork alone I was like if this is his first work then wow I'm really impressed, but since he had another manga before this so i was like "okay that explains why his artwork is so good."
The only ones I've kept in my mind were Aizawa, All Might, Deku obviously, Ochako, Tsuyu, Bakugou (Kaachan), Momo ,and Todoroki. The rest I'm still trying to get to use to their names.
As for Bleach I can't remember which episode Soul Society ended at, but I do that in the manga it's like chapter 181 or 182. So if you feel like it, I'd say start reading from there, and I'd prefer reading the manga over the anime to catch up due to the fillers (even though I think most of the fillers are good). I will say this though the chapters are kinda slow pacing I mean you could probably read maybe 10 chapters under maybe 5 minutes it's not even funny. As for shippings when it comes to Bleach I do ship IchiRuki, but I'm not super passionate about it like I am with TouKen, and HitsuHina is another pairing in Bleach I can see happening. Nice job on buying the first volume of Attack on Titan you won't regret it for obvious reasons.
I remember Naruto and Bleach in its first voumes... compared to Boku no Hero Academia, the drawing styles are miles apart.
Right of the back, I remember the ones you've mentioned and ... yeah, that's pretty much it
Although, today I learned two new names: Bakugou and Eijirou Kirishima 
Soul Society Arc ended at around episode 57 or so. I usually skipped the fillers by having informed myself ahead of the time with wiki. I heard how mindf*cked the last chapter was. People seemed to have either loved or hate it, so I guess I have to build up my own opinion when I get to that chapter. Does it look like Bleach will end 2015? I have no idea with whom Ichigo will get together, honestly. I like both girls tbh, and so far believe that I'm fine with either one of the ships to happen.
I was buying a present for my friend who reads AoT (finally), and happened to see the first volume... I guess I gave in to the devil next to my shoulder
(I told myself to save up my money from now on, so yeah).
Finished Noragami, and am about to read the manga to it ^_^
EDIT:WTF?! Noragami is also monthly released?! Ugh, isn't AoT bad enouogh -.-
This manga is getting a lot of attention, that's good. Hopefully if it is ever animated, it will not be by Studio Clown.
The rivalry seems similar to Nardo and Sauce, but doesn't look as corny.
It is ^_^ I hope an anime will come one day. Oh, SP better not touch this series 