I used to make sure to talk about real issues I was facing - and bring them up as soon as possible - but I still found that alternate sessions were intense and powerful (which made me feel closer to T) and the sessions between were somehow disappointing - didn't dig deep, felt superficial, etc etc. T said I should expect to feel differently after different sessions - they wouldn't always feel the same way.

(I'm not sure if it was the same context but I remember him saying also that I couldn't expect people in my life to always show the same degree of friendliness, warmth, etc etc.)

Not sure if that is helpful. I thought of it after less successful sessions, but not sure how much it helped! I also think that it is different if you are NOT (or hardly) speaking in the disappointing sessions. That is something that needs to be addressed. Are you comfortable with the personality style of T?