How long does your Optima battery last?

I've got 3 12v red top optima's and a 6v red top. Oldest is about 6 years old now. The 6v in our 55 coronet has sat for months and fired the car off straight away with no charge needed. The only times I've put any of them on a charger has been my fault for killing them, and they've always taken a full charge afterward. I've yet to replace one.

I've never had a "Die Hard" last more than two years. Which means my 6 year old Optima has saved me about $100. Maybe die hard's used to be ok, but none of the one's I've bought in the last ten years has been anything other than a piece of junk.