Personally, I enjoy buying reps because of its affordability hence allowing me to explore different watches. And why do I wear them? Dfferent reasons. Generally, the reps that I wear regularly are the watches I love but not to the extend of buying a genuine piece. There are certain watches I would splurge on a gen and other watches that I would simply stick to reps.
Another time when I wear my reps extensively is when I put myself in a situation where my watches are in vulnerable position of getting scratched or dinged ie. moving, gym, etc. Other than that, I generally find reps are a good way for me to try on watches, kinda like renting a genuine watch in a way.... if u catch my drift.