I flew gliders before power and have never regretted it. I "think" it makes you a better pilot and is a much more social sport. I then spent 18 years or so only flying power before going back to gliding (though I haven't flown anything recently). I was amazed how poor my situational awareness had become and how sloppy my flying was! In the gliding world you are far more nurtured .... Gliding as a first option every time!
SS