Roses, I guess. I honestly can't really tell the difference between roses and carnations unless I look closely, so I don't think I'll bother with them.
For hair accessories, I like cosmos and lilies. c:
I like cosmos and roses the most
I also like jacob's ladder, but I hate that if you place a lot of them together they tend to look too spaced out
violets and lillies are nice, but I hate that they don't have much color variation
tulips I like their shape, but some of the hybrid colors don't appeal to me
carnations I love in real life, but they're not my favorite in game, still use them a lot
pansies I only love in red
I have three top favorites: lilies, Jacob's Ladder (lilies of the valley), and carnations.
Chrysanthemums are my favorite flowers in real life. I wish they were in ACNL! (Also, I would love if there were plantable sunflowers. ;v; )
Lilies of the valley are just so lovely with their little bell-shaped blossoms. The common lilies have a very elegant look to them. And carnations -- I just really like flowers with a ton of petals. <3