The trumpet
The bansuri
As my mother was (is) a pianist, I was - ehh - forced to start studying the piano at the age of 5. Although my interest went to the pipe organ very soon afterwards, I really wanted to study the trumpet but my mother wouldn't let me. In those days I pretty much had to go with that statement.
I could start to study the organ at the age of 10. I have been playing the pipe organ probably every day since that day 35 years ago and my life is all about that (including some regrets).
Just last year, I wanted to materialise my interest in the trumpet and finally bought one. Just to experience "playing for fun", as opposed to the organ which is so often "playing for work". I haven't reached the "playing for fun" part yet but I WILL !
I discovered the Bansuri (North-Indian bamboo traverso flute) several years ago at the Musicora music fair in Paris. Flute builder Seli was selling off his work there. That's when I heard the bansuri from up close for the first time. I've been mesmerised by it ever since and I'm planning to take up its study this year or the next. This should broaden my horizon on totally different music.
I'm happy side-stepping from my usual instrument and could advise any musician to do the same one day.