Which speakers did you find bright, fatiguing or just disappointing in some way?

Alright, I get the picture. Absolutely any speakers disappoint at least some people, and that's assuming that match with the electronics is correct.
To continue. There are no real good speakers, not invented yet. Speakers are always the weakest link, in this sense. Recording and room too.
It is incredibly difficult to find speakers that don't at least annoy much, in one way or another. 
Listening at moderate levels might help a little.