DoctorWu,
If you like travelling with a bit of extra privacy, I'd say 1B is the perfect seat for you - IMHO I find that seat a wee bit claustrophobic, but that's just my personal opinion... I always like to keep an eye on those tight kebayas
You could always go for seat 4A/F - both excellent seats - which will give you a view of the whole cabin, not just a wall in front you like in 1B.
Manel