Interesting topic:

Wider deck on the "back" side of the pool.

Rectangular shape instead of Grecian because of solar cover headaches.

Probably would have gone one size bigger on my pool. I was afraid bigger meant more work.

Might have added a second skimmer due to high spider load late in the season.

Would have done a better job planning for extras around the pool like a poolhouse so I didn't have to fit things in around the plumbing.