For Flatwoods a hardtail is perfect. I recently upgraded to f/s but when I ride Flatwoods I prefer the shocks locked out for everything but Heartbreak Ridge. On Indian, and Gatorbait I think I'd open up just the front and leave the rear platformed but I've only ridden those trails once after getting the new bike before they got closed from the rain. If become a more serious rider then f/s is a good upgrade but in the beginning it's a crutch that'll keep you from learning to get up off the seat which will ultimately hinder your development as a rider. I know that getting up and off the saddle more often is my biggest problem and until a few weeks ago I rode a Hardrock hardtail. My full suspension Gary Fisher HiFi Plus pedals beautifully but and I don't notice any pedal bob regardless of whether the suspensions is in full cush or platformed but the Hardrock definitely rolled just a little bit more efficiently when doing major miles. I think it might be the tires (much more aggressive tread mounted on the HiFi) but it could be a byproduct of the suspension. Regardless my personal preference at flatwoods is having the shocks locked out. After a while you'll learn to pick your line better, carry more momentum, and to soak up the bumps effortlessly which is better for you in the long run than going full susp and making a habit of steamrolling over everything and letting the suspension sort it out.