Spring reminds me of so many things, but one of my very favorites are Lilacs.
Growing up we had 2 HUGE lilac bushes in our yuard. The smell when you stepped outside was wonderful, luckily when the hubby and I bought our house there was a lilac bush growing just outside our back door.
Every time I go in the backyard I get to smell the wonderful perfume coming off of that wonderful bush.
I really wish someone somewhere could bottle this smell without making it smell old lady-ish.