I feel like every instruments adds a lot to music.

But I love the way standup bass sounds. It does a lot for jazz songs and it sounds so damn good. Honestly I enjoy guitar and only picked it cause rocksmith exists. I couldn't afford a teacher and guitars were small enough to play at my place. Especially since electric is quiet with headphones.

But if I grew up with more money and was given a choice to pick an instrument to be taught, probably standup bass or drums would be my thing.