Took off at just under 300,000Kg yesterday in the -200ER: still F5 but it was a long runway. Our -300ERs seem to use F15 a lot, maybe something to do with brake energy limits as they appear to be the same packs as the ones on the -200?
For us, F25 & F30 are our routine land flap settings, F20 or less is associated with non-normals...