I am (sort of) TTC and semi-obsessed with baby names. 
Anyway, I love the middle name Rose for a girl, though I know it's very popular. My grandfather grew roses and they always make me think of him, so I feel like it'd be honoring him in a small way.
Is it too common, though? It doesn't really matter, I suppose. But when I grew up every other girl had Marie as a middle name and it got a bit old after awhile.