I don't think you're being unreasonable at all. An aesthetic sense is a life skill.
I know by saying that I'm going against the pervading dismissive and "outraged posters from tunbridgewells" who think you should be happy and delighted for any scraps at all from a husband no matter that they are generic and unsuitable and a waste of money
You do need to spell it out to your DH for next gift exchange time that you like xy and z and don't like ab and c.
My DH is thoughtful as they come and buys me exactly what I tell him. I surprise him with presents he never knew he wanted and loves.
Fwiw I like white flowers, hate freesias, though I like stocks, and I like roses, though not long stemmed red ones.
I like flowers that don't have too much of a smell, are not gerbers, daisy like or spiky.
I'm particular about lots of things, doesn't make me fussy or up myself, rather the opposite, as I'm thoughtful and considerate, and I buy personal not generic presents.
When I'm buying a gift, I actually think about the person, and buy things I know I've heard them talking about that they like. I'm exceptionally good at buying books for people for eg. which seems to be unusual.
Maybe print these colour fans out for your DH so he can buy you something personal and to your own personal taste next time!
The cheek of you, eh, with a "first world" personal preference and aesthetic sense? 
Op I hope you have a happy birthday.
