I noticed a lot of Spring blooming annuals haven't been mentioned. They are my favorites!
Must-haves for me are pansies (color & cold tolerance)
and sweet peas (fragrance)
And for those who grow Spring bulbs, you know how awful the foliage looks after blooming. Annuals are great for covering it up! Try these:
!
This year I'm trying Godetia since I got a ton of seeds in seed swaps. I've already got a few seedlings!