The subway sign is great - but it has the scale you need on the higher wall - and the black next to tv could have better balance .. .Consider . .I would center this under the beam on the big wall at the near end of the sofa - then you will start with better balance. The television is a big black square so might as well start with the black element across. Unless you can get a mirror across from the window to reflect something light and pretty, don't bother with a mirror here. Let's think about the wall with the small window and the black tv like a gallery wall - lots of black and white frames , contrasted with black and white mats and mostly graphic black and white art. Here's the way to do that on a budget. Visit the local thrift store and imagine frames they have painted black or white. Ignore what is in them, buy craft paint and paint them all. Ikea is also good for black and white frames. Perhaps one art piece would be an offcenter b&w blow up of that charming fellow who wanted in the picture - soften everything else back and highlight just the face and hand in a vertical mini-panorama format .. or another close cropped on the face black and white in an unposed moment like you caught here. Most of the rest . simple art. Picasso line art poster could be a big scale budget element. You might buy a bad painting at the thrift store or swap meet, paint soft pale gray all over it, then dry brush some white paint on to it. If you use color in the gallery art at all . . . use just one, and I suggest the either the blue gray / true blues / not blue greens that the chaise gives off in the sunlight. Or red. Or yellow. ONLY ONE COLOR. And, just a small touch. You can frame some objects that you've painted one shadow box frame with a real object in it. , some magazine pages, some calendar art, etc. (oversized frames), Look at potterybarn.com for gallery wall advice or on younghouselove.com in their archives .. they have some terrific posts. http://www.younghouselove.com/2011/04/its-done-and-we-heart-it/ If you can, eventually hang the television on the wall above the cabinet on a swing arm so it can pull out and angle but it can be put away flat and you can shift the media cabinet sort of centered on the sofa placement across so it isn't so tight in the corner. TV in corner pulled out good, media always there . . not so good. Now for walls - I love the window layout in here. Would you consider a large landscape oriented abstract canvas that expresses your color sense over the rest of the sofa? Take the arcing airplanes into the gallery layout. This is a great lounge!

I agree with havingfun, thicken the supports and have something growing trailing up them. I didn't even notice there was a pergola until the close up. Right now it blends in too well with the house color, consider painting it a different color. I don't know your usda zone but classic climbers for a pergola include clematis, wisteria, grape https://www.houzz.com/photos/santa-ynez-valley-mediterranean-porch-santa-barbara-phvw-vp~2485412 or go for a modern look You can also hang string lights, planters or something from the beams. Also agree lighten the front door.

I like the tiny shelves idea because that way you have more storage for your things.

Does anyone know if its a massive task knocking a door way through firth hot block interior walls? Big question I know - just not sure if they would be 'self supporting' as such and only require a lintel OR would I have to put in a steel beam the entire wall length, Yes I am prepared for engineers to have to design it but wondering whether it will be worth the cost or not before getting them involved. Any advice would be very much appreciated.