After studying horticulture for 6 years and being a florist for 19 years, I have way too many favorites.
I just thought I'd throw a few things out there to think about first before you have it all landscaped in your mind.
Soil acidity, can make or break the color of hydrangeas
Full sun, shade
Wind tolerant plants
type of soil
watering- some like lots, others little- do not plant opposites together.
Some plants are high maintenance and need lots of prunning and pinching for best results
Personnally I love to go out and fuss in my garden everyday,
It's allot of work, but worth it to me.
Last year my garden(all container garden) was only half of what I normally do because my showpuppies demanded allot of my time.
We'll see what this season brings. Maybe, just maybe, they won't destroy the plants this year.
Jill