In the Land Rover world a very common suspension upgrade is Old Man Emu springs & shocks (common in the Toyota world as well). We always dealt with the lean and you had to be sure to buy a "matched set" of springs instead of the "handed" springs (left- or right-handed). Over in England they have the drivers on the right side of the truck, and the Rover fuel tanks were typically on the right side of the truck too. So you'd buy a handed set of OME springs and put the taller springs on the English driver's side (right side) to give a half-inch of extra lift on that side to account for the weight of the driver + fuel. Over here you ended up with leaning trucks.
It's really not that big of a deal (no vehicle is perfectly level) but the severe Type A's among us (of which I am one) can get hung up on it and never unsee it, dream about it, obsess about it, get down on our expensive new trucks leaning to one side, we start seeing leaning shadows around every corner, we start accumulating copies of Catcher in the Rye, etc.
For jreifler's truck, I would have liked to see Lexus change out all your shocks/springs with new OEM stock.