I'm well into double figures bass wise.
I have specific instruments for specific bands. I always carry at least two instruments too - one to play and one as spare/ drop tunings
Playing for a living I find things can sometimes get a little 'stale' , so when it does I pick up another instrument and I'm off again!
I'm a bass addict- I love the look, feel and sounds of different instruments too. No two sound exactly the same, and this is why I will always be looking for the next 'thunderchild'