My 2cents views on the hotels I stayed in:
House of Phraya Jasaen
Hostel which has rooms with 4 bunk-beds but external toilet. In-house laundry and cafe. Building has timber rafters and high ceilings. Suitable for family with kids.
Great location at 7 minutes' walk to Sathorn Pier (ferries, including those to Asiatique and Iconsiam) and Saphan Taksin BTS. One can walk to the Shangri-la, the Robinson mall and Lebua Tower
A little noisy as the road in front is active even at 5am. 7-11 next door, a small supermarket opposite. If possible, go for rooms at the rear of the building. Cleanliness is good.
Baan Tanwa
Family-run hotel which is in an apartment block and the compound houses other establishments like an open pub screening sports programmes, a ground floor swimming pool and the owner's living spaces. Some of the space houses a recording studio. Laundry. Seems popular with long-term tenants.
Good location at 7 minutes' walk to Ratchadaphisek MRT, though the walk in the narrow soi can be quite unnerving. Very accessible via this Blue Line to night markets, Chatuchak, DMK, malls in the adjacent stations. Quite a direct drive to Dreamworld, which we visited.
7-11, Lotus Go Fresh within 3 min walk. Hawker stalls and Mookata joint next door.
Some issues with maintenance are surfacing, so I won't be back after 2 years unless a renovation is done.
River Kwai Bridge Resort at Kanchanaburi, if anyone wants, I can comment too.