I reckon Load and Reload are really underrated as far as albums go and Lars' drum work in general. I'd go on on a limb and say S&M is his finest drum work bar none in terms of the stuff they put out after the 5 first albums.
he's not a wizard technically but I love the stuff he throws in here, his style is unique if anything. I remember sombody bringing up the link between him and Moon in the fact that they like to improv / play from the heart - the drums on this album are awesome.
Justice is my favourite album of theirs though, the drums on that are incredible.
Relatively simple but effective - bit of a shame about his recent efforts live, it's hard to live up to the past though, and I can't see him wanting to do that so much any more now.