It's that with pickles and grilled onions.  No matter what In-n-Out I go to, I always get weird looks when I ask for "animal style, no pickles", like it's the pickles that make it great.  Also good is animal style fries--cheese, pickles and grilled onions.  One other thing that's awesome about <In-n-Out is that you can get as many patties and as much cheese as you want, so sometimes (rarely), I'll order a 3 by 5 animal style which is 3 patties with 5 slices of cheese, done animal style.</p>