My health total is high because unlike other 84s I'm gemmed and enchanted. While I follow the warrior stickies and go for avoidance / mitigation, there is still a stam bonus for doing this, as some hybrid gems with stam are used, as well as a few stam enchants. I also have gotten a leaden despair, but no avoidance/mitigation trinkets.
I'm also a miner.
Further, I'm gemmed and enchanted because unlike a dps, I can't simply coast along without making the effort, perhaps wearing greens well into heroics. And since you're not guaranteed drops in a timely fashion (rather, you're virtually guaranteed not to get them) it's a good idea to buy stuff & enchant what you have as you go. Unlike for dps, for tanks it -does- matter.
If it's "just the nature of the tanking role" and it's causing 45 minute queues, isn't it time to question the nature of the tanking role?