Curtains/drapes always look more polished.

Though you want a cohesive look, it doesn't have to be all one or the other. You need to think about what your needs are for each room - privacy, room darkening, decorative, etc. What is the style of your home and your decor - sleek and modern, traditional?

Depending on the style (IMHO) homes with only hard treatments (shutters, blinds, etc.) look somewhat unfinished. Drapes and even roman shades provide softness and color (if wanted) when there are all hard surfaces.

Just by looking at your pictures, my first recommendations would be traversing drapes on the sliders and roman shades, woven woods or silhouettes on the other windows.

You need to take a hard look at your budget. Window treatments aren't inexpensive.