All my oldest camp cookware is aluminium. I have an old soot blackened kettle my grandma gave me 40 years ago, which is still going strong! For cooking, as opposed to just boiling water though, aluminium is pretty poor. I find food sticks easily and it's difficult to clean in the field, it also pits and scratches very easily creating more potential for hygiene problems. I've got some lightweight stainless steel stuff which has been fine on open fires and all sorts of stoves, in fact my most useful pot is a stainless pan originally bought for a Trangia stove. I briefly had a great set of pans made of some kind of sandwich, with aluminium on the outside (lighter and greater heat conductivity I'm told) and stainless on the inside, I think they were called Duolux or something. They were really light, but tough. I think the drawback was their price (mine were supplied for a gear review.) Trangia did a deluxe set with them for a while, but I think it was too pricey for their market. Mine didn't get long-term use I'm afraid as both they and the stove were stolen.
Jack, I'm not talking the soft 'Boy Scout cookset' Aluminum pots and pans; I'm talking the new Anodized Aluminum pots and pans. I was JUST in Campmor yesterday and noticed the 'Optimus' brand of Anodized Aluminum sets, and bowl. REALLY nice looking gear for $20 or less! Once you start needing a larger pot than a MSR Ti Kettle the price goes up beyond reality compared to Anodized Aluminum IMO.