It was quite a long discussion from memory. It needed to be with a guy (me) who was very green on entering this aviation world. She basically explained all the factors that you're exposed to with flying (weather, other pilots, other instructors, different aircraft among others) and then how each of these factors might affect the aircraft and/or pilot. Main factor I always remembered and that has proved so true was the 4 seasons that we get and how the aircraft (and pilot) performs so differently in each season. Summer really bumpy with poor aircraft performance, the rainy periods when it's still ok for an amateur to fly (and the rainy periods when it's not!) etc. I've always marveled that you can look at a clear blue sky in the middle of summer and a clear blue sky in the middle of winter and the two are so very different once you're off the ground! Also how uncomfortable that "perfect" summers day of blue sky with scattered cloud can be once your feet leave the earth!
The longer I've spent hanging around the airport the greater the variation in flying experiences seems to get also. I'm a risk-averse kind of chap and have always figured the more of these experiences I can discover with someone who has been through them before beside me the better.