This is true, I plunged head on into college (university) without thinking too about my choice, I chose geography, ugh.
Then I had a panic and chose special effects, then I realised it was completely fucking useless (why make a cardboard spaceship when you can make a real one?) so I made my third change...
I was torn between biology or physics, I hated/thought I couldn't do maths so I chose biology.
3/4 of the way through biology I decided I wanted to push myself mentally like I push myself physically at the gym, so I spent the next 4 months doing 2 years of maths/physics foundation work on top of my biology, so I could change to physics before the next year.
And doing physics is awesome, it's just like how I feel when I go to the gym, if I find something difficult I love it, because I can work towards understanding it.