Did you know you can get them in a few different colours? Cream, orange, pink, white and yellow. There's a frilly trumpeted Daffodil that is in the softest orange trumpet with cream petals - now that's a beautiful Daffodil.
There's a few meanings for Narcissus including egotism & vanity (obviously!), regard, forgiveness, chivalry, unrequited love, a return to spring & rebirth (that's in the Northern Hemisphere).
When it comes to care.... The need some quarantine time unless you plan I keeping them on their own. The sap that comes out of the stem is toxic to other flowers. When you get them, cut at least 2cm off then keep them cool and away from the sun. Leave them on their own for a day if you plan on mixing them with other flowers. (Yes your qualified, experienced florists do this behind the scenes).