I can't count the one I went to as a little boy because a child under 4 can't really answer such stuff. I remember it warmly, however. There were a lot of people who would smile and say hi, but I was a kid afterall.
My second hall was the worst. Seemed run by power-hungry blue-collar elders who loved being the boss for a change. What I found extremely different between halls in the region, particularly this one was that people DF'ed would stay DF'ed for a year or two. And man were they strict. One guy was so sincere and regular in attending. Once his car died and he walked the rest of the way in the snow and got that counted against him for being late. Didn't matter that he made it every other time, that one time set his progress back. Of course, he was DF'ed for messing around with an elder's daughter who only got reproof. The cards were stacked against him anyway. By way of contrast, I went to a quick build hall a state over and made several friends. I was amazed to hear of disfellowshippings lasting 3 to 6 months. Sometimes only a month. That sounded more in the spirit of a rebuke. 1-2 years sounds cruel.
Then came hall number 3. This during our late teens to early 20's and the last one my brother and I went to. We were the quiet and shy type and, although this hall had a lot more people our age, they were kind of clique-ish. Around age 18, we started drinking a bit, probably fueled by our mother's sudden death. Well, about 3 weeks after her death, we get invited by some of these kids to go on a trip to a big amusement park. We're thrilled by the chance to make friends with them. Only one guy shows up though. We decide to go anyway. On the way there, we discover he loves to drink too (in fact he later discovers he's an alcoholic). So we spend the day getting plowed. Suddenly, we're part of the "in crowd". He goes back and tells everyone we're cool, we drink. Now we're being invited places, hanging out with them. We're accepted! And all this helped to fuel us to more drinking. After all, that's what got us accepted. After a while, things started to get too wild for some. They felt guilty and went to confess their sins to the elders. In my opinion, because we were the newest members of the clique - the ones they didn't grow up with - we became the scapegoats. Though everyone was doing this, we were the ones the parents didn't want their children associating with. So now we were the outcasts, back out of the clique. During one point, I really changed. I gave up drinking to excess and got serious about the religion. I even tried to aux pioneer, but they wouldn't let me - or at least wouldn't announce me as such. So I went out the 60+ hours anyway for about 7 months. Not that I was doing it for brownie points, but still, you'd think some people would recognize you're trying and stop giving you dirty looks. It didn't help. After a few more years, life situations changed. My brother and I moved to another part of town and never found a new hall.
At my second hall, I felt there was a lot of corruption at the elder level. At my third and last hall, I felt the elders were more sincere and caring, but many of the people were very unChristian, mean, and vindictive people.
I also went to other halls to get away from time to time. When I did my un-recognized aux-pioneering, I went out a lot with a regular pioneer friend of mine from high school, who lived on the other side of town. It was a poorer part of town and the people were much nicer. I didn't spend enough time there to really get to see all the cliques and politics at work, but I felt more accepted.
I think experience can very much vary by hall, by area of the city, by state, etc., etc.