It's strange but I never realised how taxing it was to listen to the T1, they demand your attention and concentration. That is a weird thing to discover; I find it hard to relax with these things on my head.
That's why I keep my HD650's around for relaxed late evening listening, I cant ever imagine falling asleep with the T1's on my head you just want to keep feeding them track after track! The HD650's on the other hand are a different story, I have lost count of the number of times I have nodded off to while listening with them.