Yeah i think Leons was good and Ada's was really cool, Ada's is a bit more stealth based with some good fights and weapons. I was very disapointed with jakes, i thought the end boss was great , but some of the levels were terribly designed,
-Spoiler-
especially the snowy level trekking around looking for three codes from a USB stick that Sherry still had. Seriously stupid story for a start, a USB Stick breaking up into fragments. The foggy snowy level just looked awful to me and I got lost in a loop sliding down the big slope then running back up it about three times. There was also pointless snowmobiles knocking around on a pretty small map and just that whole chapter was a chore to me.
Oh? Well I wasn't that impressed by the map... but it was the easiest one imo. You just run around till you encounter a dude on a snowmobile, kill it, get on the snowmobile and drive around, getting all parts. Was actually kinda fun.