The intersection of Sukhumvit and the MRT, surrounded by malls, offices, and some of Bangkok's best mid-range hotels.
Asok is where BTS and MRT intersect — supremely well-connected; Terminal 21 mall above the station is one of Bangkok's most fun malls.
Each floor of Terminal 21 is themed as a different global city — cheesy but enjoyable; food court (Pier 21) on the top floor is one of the best value food courts in Bangkok.
Business travellers, mid-range tourists who want convenience; good range of accommodation from hostels to 4-star.
Everything from street stalls to mall restaurants; especially strong Japanese and Korean restaurant clusters in the surrounding streets.