I don't mind receiving living plants, but could you imagine receiving them often? You'd probably end up with a bunch of flowers and nowhere to put them. I think a bit of both would be ok. I love flowers in pretty vases. Besides, they can always be composted.
A living plant. It lasts longer and can freshen up the air in your house. I have read that the cut flower industry uses as much pesticide as the industrial farming industry. In that respect, I feel it is not good for the environment, so I prefer not to have those.
I prefer bunches of fresh flowers to brighten up my house. A living plant I would only give as a memorial to someone I know well and who would prefer to have to put in a garden as a memorial to their loved one.