bathroom
note, a smaller vanity between the walls would look ok. i love the idea of a accent wall/ wallpaper/ tile behind the vanity too. perhaps that something to do in the half bath/baths downstairs though- i know it can get pricey. note; looks to be about 1-2 inches on each side which means a 54- 57 (maybe 58) inch vanity woudl work on each side. i also love vanities with the legs at the bottom so i can clean under them or minimally - ones that look like they have legs at the bottom because i like that look.
floor
darker color behind vanity may look good
Q