The short version
Bang Rak is central Bangkok at its most layered: Charoen Krung, Silom, Surawong and the river all meet within a compact area. It suits someone who wants offices, old shop houses, galleries and dinner on foot, and who can tolerate traffic, noise and a street life that does not switch off neatly at sunset.
The riverfront is not the whole story. Around Charoen Krung, old commercial buildings sit beside hotels and newer apartments. Silom feels more corporate, while the lanes off Surawong are mixed and occasionally scruffy. Choose the exact street, particularly if sleep matters.
Getting around
The area is unusually well served. The Silom MRT and Sala Daeng BTS interchange covers the office side, while Saphan Taksin BTS and the river piers make the west bank accessible. Bang Rak is one of the Bangkok areas where a car is more burden than advantage. Walking between the main roads is possible, though footpaths can narrow around deliveries, stalls and parked motorbikes.
Daily life and the compromise
This is a good address for people who like errands to have texture. Charoen Krung gives you old religious buildings, riverside institutions and independent businesses; Silom supplies supermarkets, gyms and weekday lunch. The same mix means that a handsome building may have a loading lane, a bar or a noisy road below it. Inspect at night, not only on a bright afternoon.
Who should choose it
Bang Rak works best for a single professional or couple who values location over floor space. Families can live here, but the short walk to a café does not remove the school run, and larger homes are scarce. I would choose it for a fully urban life, not for quiet or easy parking.