Never heard a speaker I bought I disliked. I have bought Yamaha, Klipsch, Polk, Audio Concepts ( defunct?), and B&W. I own KRK powered monitors, and they are ok given the rock bottom price, but I suggest people serious about mixing audio might want to step up to something better
I once heard a Cerwin Vega in a store that did not sound right to me, boomy bass, but can you really make such evaluations from a speaker at a Best Buy?
I know people hate Bose, and I thought their wave radio sound like crap, but I once heard 301 or 501 or something like that which sounded pretty good.
It seems to me, that as speakers involve so many compromises, there's few bad speakers, just stick to trusted manufacturers. At the end of the day, seems until you can get the speakers in your own home, connected to your own amp and setup you won't be able to evaluate them with any accuracy.
Also note, that with the typical use of powered subwoofers there's a big variable there in terms of how the speakers are going to fit in that almost no review or store eval is going to help with.
One thing I can't stand is boomy bass, but make sure it's the speaker not the mix. I find a good pair of headphones can help you find inherent problems with a song's mix so you don't accidently attribute that to a flaw in the speaker. This is something I don't see mentioned much but I found helpful in my own evaluations