When I was younger I thought it was more fun to be anywhere but the bedroom, but as I get older it represents sharing my space and intimacy just as much as wild monkey times. That means more to me these days.
Usually the best sex for us is in the bedroom. But that is largely due to all of the conveniences/perks of the bedroom (lube/toys/towels/bed/ mirror). However, the great outdoors does add a great deal of excitement to things.