One could argue that every action we undertake in life gives us a bigger understanding of ourselves and helps to develop us as individuals in a rapidly changing and growing world, but travelling is definitely one of those areas that can really make an impact.
Travelling has given me so much, both mentally and emotionally, made me grow as a person and learn things about myself I'd never had known otherwise..
I'd say though that while I do enjoy solo travel a lot I've found a lot more joy in travelling with @iwanderela, the constant sparring with a close partner opens up lot of possibilities that I tend to overlook as a solo traveller :)
Keep up the travelling!