The last time I was there and stayed in the Opera area, I had contacted my hotel and for 70 euro or so I benefited from an airport collection and drop off: shared mini bus but saved me the hassle of the transports!
Which is ironic because the Roissy bus starts at Opera, runs express to the airport and costs €10. If you were anywere else in Paris, I'd understand it
Would any first time couple (or more) really avoid that expense and choose metro, bus, shuttle over point-to-point taxi ?
We regularly do. I think the only time I've ever taken a taxi over public transport was Orlando because it required two buses and we had a lot of luggage. We've managed to make our way from airports using metro systems in most European countries (including Athens with it's different alphabet). Partly I don't see it as any hassle (normally), I don't see the point in spending what is usually ten to fifteen times the price and partly because it familiarises us with a metro system we'll probably end up using anyway over the course of the holiday.