This is the sense I get from talking to some people.
Biblically it doesn't matter, but I think that those who want to be cremated generally show forth a rebellious attitude, what Im meaning is there seems to be a message in the act of the person saying to God, I'm dead and I'm going to stay dead, if you want to resurrect me, then I'm going to make it extremely difficult if not impossible.
Of course everyone is still going to be resurrected, it's no problem for God, so the snub to God is pointless...
Just me personally death is pictured by sleeping in the bible, and we are woken in the resurection, knowing this it seems more natural to just be buried, I know it doesn't matter just seems logical, Abraham bought a field for burial in the promised land, again that sense of wanting to be in the promised land when we are dead/asleep, seems to be tied to our inward heavenly desires, desiring to be clothed in a new body, closer if not readier to be with the Lord.