Basically, it seems (to me) that when you go to a church (the ones I've been in before age 31 and JW baptized) there was a feeling of reverence and where one worshipped.
The KH is cold and impersonal (as someone said-like a study hall!) We were even told many times that we were there to *learn* and not be swept up in the trappings of a church-like surrounding. But I missed it---a lot. The last church I went to before becoming a JW, was a big beautiful Cathedral in Springfield MA. (With all the trimmings!) Going to the KH was quite a jolt to me!
The first KH that I was taken to, was a small building in a rather seedy part of the city and had concrete floors and metal folding chairs. Quite a shock after having been attending the biggest (and most magnificent) church in the city.
I was originally baptized in infancy in the Methodist church, made my confirmation in the Congregational church at age 12, and began going to the Catholic church in my teens when I stayed overnight with a girlfriend and was so impressed with it, I stayed there until my stupid JW mistake.
I have visited several other denominations with friends and have even gone to a Synagogue on occasion, so I didn't just hop from only a Catholic church to a KH! The only major difference was that if I changed my mind about attending a KH (after foolishly being baptized) was that my whole life would be viciously turned upside down forever.
As with everything else, it seemed as if the WTS went so far overboard to show they're "not like the world", that they look foolish in the effort!