I bought Horse Armor the day it came out. I am pretty sure it was the first DLC I was ever exposed to and I took a gamble. It was pretty shite and pointless, as everyone now knows. It was doubly pointless for me because I never even used a horse in Oblivion. The mod that puts the horse armor on all the Legion horses was alright though.

Anyway I didn't buy any more Oblivion DLC until the Knights of the Nine retail pack, which included all of them. I tried them all out then and other than Mehrune's Razor they're all pretty pointless. When I replay Oblivion I don't even bother installing any of them other than Knights of the Nine and Mehrune's Razor.

Luckily Bethesda has improved on the DLC front. Three of the five Fallout 3 DLCs were pretty good I thought, especially Point Lookout which was almost an expansion. DLC in general has improved a lot with Mass Effect 2 and Borderlands, among others, putting out quality expansion-like content.

The problem isn't stupidity. Because the human race has always been like that. The problem is that stupid people have increasingly (self) destructive means at their disposal.