Pawn Stars is definitely not your routine pawn shop experience. Like abi posted above the popularity of the show has definitely altered it's business from that of your regular pawn shop. Most pawn shops are about helping people who need money by buying things from them at a low price and making profit on the resale. If the person doesn't want to actually sell the item then they can get a loan on it (pawn it) and must make payments plus interest in order to get the item back.
Pawn shops are generally not "nice" places to visit. By this I mean, don't think of your routine clean and pristine shopping experience like going to a mall or a national chain store like Target, Wal-Mart, Best Buy, etc.. They are not always in the best parts of town and often have bars on the windows and doors. Pawn shop owners typically want to buy things they can turn around and sell for profit. You will often find used electronics, jewelry, tools, sports equipment, etc. Everything in the store is bought and sold through negotiation, price tags are meaningless as it's all about the "art of the deal". Profit and loss are all that matters to the store owner, they don't care what you can find the item for elsewhere. Basically, if you are not the kind of person who likes to haggle and bargain then you won't do well at a pawn shop and probably won't enjoy the experience.
As antiques and resale items have increased in popularity through reality television people have gotten the idea that they can find a "diamond in the rough" and make a fortune, but the truth is most pawn shops don't deal in antiques or collectibles. People have also gotten the idea that they can find a deal at a pawn shop, which is also not typically the case. Exposure has actually served to raise prices across the board in my experiene.
In my life I've bought some things from pawn shops and it's been a good experience. For example, as a teen I wanted to start playing golf. My dad wisely took me to a pawn shop and we bought a used set of clubs for $60 to see if I would actually take to the game. When I did, it was then justifiable to spend a greater amount of money for an actual good set of clubs. Had I just played for a summer and quit then the $100's of dollars spent on new clubs would have been a waste. Shopping at a pawn shop can be fun and a good experience. You just need to know what you are looking for, do your research, and be prepared to bargain or walk away.