What kind of tree do you/would you prefer and why?
As for me, I had both at one point in my life.
The real ones smell good but require too much matinance (Vacuuming twenty times a day because their needles shed, carting the thing from wheever you bought it from, watering it, ect.) The artificial ones are easier to tend too (No shedding needles! W00t!) but they're more of a pain to set up. Plus, the branches like to leave irritating little scratches all up and down my arms (the real ones never did that to me, at least not what I remember.)
While both have their ups and down, I prefere the artificial ones.
Speaking of Christmas Trees, I found another strike against the Real trees: http://health.yahoo.com/news/healthday/livechristmastreescantriggermoldallergies.html