I don't really like PCs to be too expendable.
Now... I don't mean that I don't think the PCs should ever lose or be in over their heads. I just mean that I like PCs to have a certain amount of fleshed-out characterization and they should be sturdy enough that one bad roll or slip-up doesn't mean having the effort of establishing that be in vain.
I'm a failure at being an old-schooler, aren't I?