I love the big windows on the main living level as well as the painted brick. I kinda like the bedrooms, too.
Just for the heck of it, here's what I'd do if I owned the place and had several hundred thousand to put into renovations:
a) On the basement level, I'd put a gym (assuming the ceilings are tall enough), a media room, get rid of the laundry setup there and add a half bath in its place.
b) On the garden floor, I'd open everything up, turn the bedroom into a sun room, turn the full bath into a half bath, with the door re-positioned so it doesn't open into the kitchen, and the area where there's currently a bathtub, closet, and refrigerator, I'd turn into a laundry room. I'd put the kitchen where the dining room is, a small seating area (maybe just two armchairs and a small table) right in front of the windows, and then a long dining room table in the center.
c) On the next floor, I'd keep the living room a living room and turn the kitchen into an office/den/library, keep the half bath, and replace the laundry area with a wet bar.
d) On the top floor, I'd put the bathroom sink on the opposite wall, close off the door into the hallway, and put a door directly into the master bedroom where the sink used to be. I'd add a small full bath up against one of the windows in the other bedroom and a closet along the same wall.