I think I would do bullnose all around in this kitchen, no schluter. It will need to be laid out carefully and you will also need short end bullnose, long side bull nose and some corner bullnose, I think.

So I've found that different brands have varying bullnose available. The tile and color bullnose to match only seems to be 3x6 with bullnose on long side. Will that still work?

The tile on the vertical part of the window jamb will have to go vertical if they only have long side bullnose and not end bullnose. But then there will be no bullnose on the top edge on the top row of the tile in the window jamb area. You may have to use Schluter if the tile does not have the right trim pieces

I have the same set up in my soon to be replaced kitchen. My window has drywall returns and the window sill is tiled and I really dislike how it looks. Part of that is due to the mediocre job done by the tile installer used by the prior owner of my home.

You can't just tile your window sill, you need to tile part of the sides of the window.

In my remodeled kitchen I am planning to leave a bit of extra space around the window so I can have the window framed out with trim and I'm putting a marble window sill in. My backsplash tile will just run into the trim.

I would definitely do some kind of a window sill and no tile in the window area. You could do a painted wood window sill or match the countertop. Honestly, I would consider installing white painted wood trim around the entire window and the windowsill. It will look infinitely better.

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If we go the tile route, we plan on something like this. We did plan on going up the side partially to line up with the tile on the wall. Thoughts on these?

The tiled windowsill reminds me of a bathroom window located inside a shower. I would not do that in a kitchen, even though it may be the path of least resistance. I would trim out the window complete with a wood windowsill.

@daisiesandbutterflies that is an excellent point. I think I will definitely go with installing a window ledge and trim or just have him wrap the tile around the lower sides. @Izeve I love those ideas too. This job is likely about to get more complicated :-)

Thoughts are: these but I do feel that with the pic w the single sink the tile should be wrapped around the sides.

Consider asking the countertop people if they have some leftover from the counter. You could measure the window to give them an idea how much you actually need. Ask if the people who will be installing the counters can verify the measurement. I believe if they can provide it you can install it since it is not a large items. Just something to consider

@Toni Hamlet that is a good thought.

What do you all think about the way the sides are wrapped here? I know it's hard to see. I had to crop it.

If you don't trim out the entire window but just have a window sill installed, then I think wrapping the tile is fine. Keep in mind that your window sill is not as deep as that last photo you posted so you will not achieve that look. You only have enough width for maybe one tile around the window?

I still think that installing painted trim around the entire window would be the best solution. It would give the window a lot more presence and would look a lot more intentional.