I can forgive a tank pulling 3-4 mobs at a time, rather than 7-8-12 depending on how many packs are between them and the next wall. If you don't know me, you don't know how attentive my healing is or if I tunnel vision too often with my holy spam, so pulling slow is preferential as long as you're ready for the next pack immediately after.

I can forgive forgetting CDs once or twice a run, because sometimes you just don't necessarily remember parts of your kit. That, or a run is going so smoothly you don't even think about it.

But holy fuck, does it annoy me when a Tank doesn't realize they're undergeared, or their healer is undergeared, and starts running like a loon from the getgo.