The second look like they are designed for stairwells so I'd be a bit wary about using them up higher as the light might be a bit "spotlight" and not diffuse enough. I think both styles work with your house design

Depends a little bit on the style of your house , but my first reaction is the same as bigreader -- no , and almost certainly no , no , no , no , not 4 rooms in one house . Some of the schists look alright , the 80's style might suit an 80's or even 50's minimalist American house . There are some fairly cool 'wavy' panels that are available these days ; even some feature walls that look like timber ends sticking out of a wall ; wallpaper works in some places ; but one wall of brighter paint is the most obvious 'feature wall' . Faux Stone , or that ship-lap timber , or diagonal timber are about as exciting as yellowy beige or mission brown .

If you are happy with the walls as they are , its a huge cost and effort to just hide some power points . To a small degree , it will also depend what you want to run . Really power hungry appliances ( 2000 watt heaters etc ) may need new wiring , rather than just hooking into the existing wiring . But like bigreader , I'd look at coduit , extension leads ( if lower power use ) and even multi-boxes -- I have used individually switched brushed stainless 4 way ones ( about $80 instead of $10 beige unswitched ones ) and even mounted them to the wall -- they look quite classy and purposeful . And if all else fails , using furniture to hide leads is a good idea .

As in our house because the wall at the end of the passage was only a doorway space from the Arch there wasn't any load bearing problem Check with council to see if you can find any old plans, the Archway to the bathroom could be just because you could or that space had a different use a lot of bathrooms and kitchens were at the rear of house the house during that period