My favourite is lavenders, because they smell beautiful and lilac is my favourite colour.
I like rapeseed due to the colour, it reminds me of the yellow brick road. Although it is bad for you so it comes second.
Poppies are obviously the most iconic though, due to both the Wizard of Oz and WWI. It is the latter association with poppies which makes them last for me, I can't looking at them without thinking about death and war.
