I am not quite sure how big the skylight window is but I would use a motorized skylight shade. Here is an example - Motorized skylight shade on blinds.com There are a ton of companies that make the motorized shade so you can pick any material. I would use a cellular shade that was blackout in the skylight. With motorization, you can open and close the treatment as you need. For the window wall, I would also look at motorized shades. The question would be an aesthetic question - Do you want the shades to be on individual windows or do you want one long treatment on each vertical window grouping. Individual motorized shades would probably be nice because you could operate each window separately. Most of the motorization controls are built my Somfy. For the type of window treatment, cellular shades offer some thermal insulation, double cell is better than single cell. I am not sure if you want black out shades for these windows. Motorized shades options from blinds.com for example. One other options is to put the window treatments on the outside of the windows if your exterior permits. Take a look at Bandalux for some ideas. Good luck in your search!

Look at Houzz photos "roman shades on bay windows" and you will see a bounty of delightful window treatments for bay windows. It is assumed the space is a main living area, so the formality or casualness of fabric for romans would depend on the planned furnishings and décor for the room. Is this helpful?

@the Wiese Company: Yes, i looked at those since I just bought some for my upstairs office (blinds.com), which has the same new windows installed (albeit only half the width of the kitchen window). Unfortunately, with the trim around the window, the mounting bracket for the blinds are too thick to get a good looking inside mount. Do you have any recommendations on where to buy these with thinner mounting brackets? @luckyblueye: I’m thinking exactly of the reason that Anglophilia posted after you why I’m hesitant of curtains, even though they’re washable, but how often do I really want to wash curtains? @Anglophilia: I’m not a huge fan of awning. Especially for that part of the deck since it is pretty narrow (and not the main part we hang out on), so besides the sun/privacy it would have no use outside. But it’s a good thought otherwise! @Sara Sitardites: I like the idea of shutters, but not really the price tag... :) do you have a recommendation on where to buy them? Also, similar thing as with honeycomb blinds above, there is not much space within the window “box” for installation because of the trim. Did you run into a problem there? Thanks everybody!

The only thing that I would add to Beverley's excellent answer, is to make sure your drapes don't puddle. I remember when it first became a fashion and it was marketed as looking "luxe". It doesn't: it looks like you couldn't afford to buy drapes that fit. Drapes should just clear the floor- 3/8" will do it. Your eye won't notice the small gap, but the drapes will hang straighter and the won't become the preferred hangout of any dust bunnies in your home.