I’d say chocolate in a heartbeat and I don’t think that’s immature 🙂
I like fresh flowers as well. A lot. With our small emptyish apartment, fresh flowers add a whole lot of life. Fake flowers just don’t stand out the same way as a fresh bouquet. I know it’s not practical though for everyday (got fake ones for that) but when we’re home for Shabbos that’s the way it’s got to be.