1. Leon's or Ada's - I couldn't decide which one was my favorite. I loved Leon's campaign all the way through, I enjoyed it the most out of the inital 3. As for Ada's, while it was the shortest (Or at least for me it was in time wise), I still enjoyed this campaign a lot and there was just something about this campaign that I just really liked, can't explain why exactly, it's like it's own little charm that made me like it so much to be considered one of my favorites.
2. Chris's - To be honest, I enjoyed this campaign a lot. I found this one to be a lot of fun. However my main complaint about this campaign was that it felt like a few parts took forever to complete, but it was only one or two times.
3. Jake's - While it is my least favorite, I don't really dislike this campaign, I like it, it's just that it is my least favorite. One thing that I absoutly hated about this campaign was the stealth sections, and while there was only like 2 of them, I really didn't like them. The first one where you have to get the key near Ustanak was not that frustrating as well as the bugs that would alert him. The one that really aggervated me was the 2nd section which if I am not mistaking, only happened if you play as Sherry, I hated that one, if you made one mess up without knowing what the code is the for doors then you'll have to do it again because they'll just keep looking for you and if have a high possibility to find you. I also didn't like that this is so far the only campaign where I was annoyed due to some of the parts having infinite respawning enemies. This one also had parts where I kept thinking that it was taking forever.