Some people do, some people don't. Strength, dex and con are for the most part played, because they're often clearer in the way they affect the char, decreased movement and such.
I've seen some players RP there low charisma, intelligence is a bit different however.
A fighter with 8 intelligence or wisdom, 4 after death might makes quite a good idiot.
If he'd RP it, he'd probably has forgotten where he even died. So retrieving the grave might become a problem then. Or he remembers it, but he thinks that this time he should be able to handle the balor, that killed him the first time.
EDIT: Disclaimer.. this post is not to be taken too serious. The author does not take responsibility for any effects this post may have on RP'ing on Layonara. Especially for fighters who actually decide to visit the balor for a second time.