My 2p. If your typical riding is scottish moorland, hills, etc., for a different style of riding, it would be a shame to miss out on tight pineforest singletrack such as we have in the Hampshire/Berkshire/Surrey convergence, even if just for a day or two. It's different and for that reason difficult to say better or worse than your usual but if you're down here a shame not to see it.
For that reason – Surrey Hills (Peaslake and check in Pedal and Spoke for location of the good stuff), and the army lands around Pirbright/Frimley and Swinley would be worth a visit – Google maps will tell you where and they're such small areas in er, area that you can't get lost, but can easily spend a few hours following tyre tracks and discovering some very nice singletrack.