A genuinely local BTS stop where expats live cheaply and tourists almost never go — Bangkok as it actually is.
On Nut is where Bangkok's young professional expats live when they run out of money — affordable, functional, surprisingly comfortable, and completely unpolished.
On Nut BTS station, end of the Sukhumvit line downtown section; 10 minutes from Asok; super easy.
Tesco Lotus, local markets, affordable restaurants, a few co-working cafes, muay thai gyms — life, not tourism.
Get a glimpse of non-tourist Bangkok; excellent street food at local prices (30–60 THB); good spot to base yourself if budget-focused.