Most people only have one mtb, so hardly unusual. In fact, outside of bike forums, most people only have one bike period, gasp!
Anyway, the best bike for you is diffident than for me. Where do you ride, what style of riding do you have, how tall are you, what bike brands does your preferred shop spec all influence your choice.
It’s cool that there are so many good bikes out there these days, and a very broad variety. Add in some customization, and everyone can ride the bike they like best.
My current MTB is a Bird AM9 with some serious modeifications.
Our local trails are not long and steep, so a 120-150mm travel bike suits me well.
I like big tires.