My first MTB built as adult

I always been kind off a roadie guy and considered MTBs not needed and slow and waky, cuz my childhood MTB bike was such. And then I discovered to myself old MTBs, they feel less like tractor and more like just lil bike for a fun riding. So I built this Carbon Koga-Miyata TrailRunner for around 240$ in total. Now I started to ride local forest trails with more fun than I did it on fixie with flatbar.
Also it's kinda cool that on this bike I can compete with guy's on modern bikes that cost few times more. Bike weight is 12kg, consider 90s 2.4" tyres