I know Seaflower well,it is a nice setting with cheaper thatched huts, perfect for a laid back beach break,great gearden setting and is owned by a Canadian -Thai couple although I dont think the Canadian lady is there much these days.
The beach is ok, but the next beach along Haad Yao is much nicer, there are photos of both beaches in my photo section.
Koh Samui can try Lamai Inn right on the beach in Lamai.
Krabi I recommend Railay Beach-do a search on google but a bit more expensive but i think worth it,