Kind of a biased crowd. Done plenty of all three. Soaring in anything is a weather dependent bipolar hobby. Nice thing about paragliding is it would be fairly cheap to chase weather in Europe and bring your flying machine. Sailplanes are going to get more out of the marginal days so if you don't fancy travel that might be a better choice. Cost is an issue if you don't have sailplane money, sharing club gliders can be miserable as to time spent standing around vs flying. Some clubs are much better then others. Time to learn if you go to a sunny European training site learning to fly paragliders you can get well on the way to being a solo pilot in a week or two.. Sailplane training in England is through clubs, and it is the nature of the beast that most places it can take a year or more of weekends to be a self actualized sailplane pilot. Not due to difficulty but due to limited resources. Try both, more importantly visit local sailplane and paraglider clubs and decide who you'd rather drink beer with then choose your flying machine accordingly.