Gliding & power flying
Might be useful to know where you'll be studying. In the UK there's quite a few university gliding clubs. Not sure how it works in France.
I don't think that gliding hours can be logged as flying time in your power logbook but I'm sure that TMG/SLMG time can be.
More importantly you'll be exposed to an area that uses aviation as sport and not transport. So if you like to be challenged by changing conditions involving constant re-assessments of the situation (including spacial, situational and weather), accept that you're operating in a see and be seen environment (which helps develop your lookout skills) and are confident about your judgement skills (glider pilots don't have the luxury of a 'go around' lever), then gliding could be for you. Add to the mix the opportunity for aerobatics and racing and having a bundle of fun with a bunch of (usually) sociable people.
Give it a go!