Since you have a sloped ceiling angle, I think it looks proportional as shown. The amount of negative space on each side of the hood appears balanced.

I see no reason not to use a standard rectangular island. I don't like the it as drawn. Your space has lots of angles. The round seems forced and artificial to me.

Yes, the negative space between each side of the hood and the uppers is equal. That area will likely all be filled in with a tile or slab backsplash up to the top of the cabinets. I guess the negative space around the hood and the sloped ceiling might trick the eye into not seeing the hood as off center.

We had originally planned a rectangular island with a row of 3 pendants down the center. I was afraid the row of lights not lining up with the hood would just highlight the problem. We might do track lighting with more randomly placed lights over the island. (We have wood ceilings, so recessed lights are not an option.)

The cabinet door style we picked has slightly rounded edges, and DH likes the SS and glass hoods that are curved, so I thought a curvy island might work.

It doesn't look as though the hood is centered in the open space. That would bother more than any symmetry in the upper or lower cabinet size.

I don't think the curved island works either. Maybe if it was some sort of oddly angled trapezoid or triangle it would work better. And it makes your clearance at the refrigerator really problematic. If you have seating at the island, you need 60" behind that seating for anyone to pass by (or access the fridge) while someone is seated there.

The hood will be centered between the uppers, even if it does not look like it in all the pictures. It would drive me batty if it weren't.

There is seating at the closer end of the island. My kitchen is not wide enough for 60" between the freezer and the island. (The fridge is at the far end, where there is no seating, and has plenty of clearance.) I originally had 48" aisles on both sides of the rectangular island, but now it is down to 41" on the sink side and 44" at the widest part of the curve on the other side. I tnink that will be too tight.

If I go back to a rectangular island, should it be centered on the wall opening or the range?

Make the lowers all drawers :)

I like the island shape. Search here for NYSteve's similar one. Looks great!

What's going on with the sink side? It looks like you have a DW + cabinet + sink + cabinet...is that correct?

Where is your trash pullout (if you have one)?

I think a trash pullout either left of the sink or in the island on the sink end would be best.

For the DW, can it be moved to the other side of the sink (right side)?

Marcy, most of the lowers will be drawers, except for the 2 sink bases, trash pullout and blind corner. The cabinets around the sink base will be drawers, not doors as shown on the CADs. Thanks for the tip about NYSteve's island - that really helped me picture the shape.

Buehl, I plan to have a pullout for recycling and trash in the island near the sink. I also want to put a second small trash can on the door of the big clean up sink to scrape plates off before they go in the DW. The sink wall, from the corner of the L, is as follows: 36" drawers, 24" DW, 17" drawers, 33" sink base, 17" drawers, 24" wine fridge (close to dining room).

As far as where to situate the island I suggest placing where your clearances for fridge and dishwasher lead you.

I think it's beautiful, love the negative space around the hood, the placement of the fridge/freezer duo, and the way it all fits into the space. I even like the circular countertop on the island, to me it makes it look ultracontemporary in a good way. If I were going to have a contemporary kitchen, I'd like to have this one.

Are you tall? It looks like your wall ovens are set quite high off the floor and your uppers are more than the standard 18" above the counter. I'd have problems getting items in and out of the top oven without burning my arms, especially anything on the top racks (I'm just under 5'4").

If you need guidance to figure out what height to install your wall ovens, check out the post (linked below) on this subject at Kelly's Kitchen Sync, a blog written by CMKBD Kelly Morisseau.

Here is a link that might be useful: Cooking ergonomics