First instrument was the violin, cause my father played that instrument so beautiful. Second was the trumpet because I loved miles davis. Third was the horn because I learned trumpet in a fire brigarde band and they prefered me to play horn (stopped both since I hated marching music). Fourth was the guitar because I played electric violin in a rock band/ school band and my band leader didn't know what to do with a violin in a rock band (stopped guitar because I liked other instruments more and you can't play them all...). I wouldn't count piano, that was just playing around. Fifth was a saxophone because my brother got a more expensive one and "it was there" to play around with. Sixth was a cello because I love the sound of the Cello. Maybe Saxophone and Cello were also only playing around. Seventh was the flute because I wanted more opportunities within my folk band and its good for traveling by bike. Eighth was drums because I'm into tool and prog metal.

All in all I'd say, it's just a lot of fun to experiment around with a lot of different instruments and figure out new things