But what is actually so nice about that?
Does it rub your ego somehow that you are able to pay with bitcoins even though no one knows (apart from you and your card provider, of course) that you are actually paying with bitcoins ? I guess the same felt people with first cell phones and first payment cards as such but apart from that, I don't think it is a good idea to waste your bitcoins which you could use to multiply your capital (even if via simple Bitcoin appreciation over time). I guess you should use bitcoins to make even more bitcoins and spend cash instead on casual things (such as gas)
That may be true but in some situations bitcoin can help out through the daily small trades, like grocery, gas,etc.. in my case as an unemployed (atm) student, I'm using bitcoin I earn from signature campaign to buy groceries daily, pay monthly internet bill and phone bill, and believe me it helps a lot.
So id that boosts hes ego, the let him do it. I'd love to eat at a restaurant and pay with bitcoins, just to fell that... feel of paying something with bitcoin in person rather then online transactions or trading bitcoin for fiat.