Once you try clipless pedals you'll know why they're so popular. I've never heard of anyone going back.
And then there are people like me who have 2 sets of cleats and pedals (spds and crank bros. candy c) in their closet and do all their riding on flat BMX pedals with pins.
It's whatever you like man -- whatever makes you more apt to ride is what I'd go for. I don't give a rat's ass about how much more or less efficient I am with pedals.