In the old games like Ultima Online, Everquest, and Dark Age of Camelot it seemed like community mattered A LOT more than it does now. In those games your reputation was everything. If you were a horrible player you got no groups, no gear, and stayed broke. But these days you could be the worlds worst gamer and still join LFR and load up on raid gear. Also the worst part is that being bad seems to be an acceptable play style. If you criticize someone for being bad everyone jumps down your throat calling you an "Elitist".
Also it seems like trading isnt what it used to be. In Ultima Online trading was done around the crafting areas. Smiths would set up shops around forges and advertise their services selling weapons, armor, and doing repairs. Alchemists and Scribes would sit outside mage shops selling potions and spellbooks. People would also set up vendors in either their own house or someone else who owned a large house in a highly traveled area. In Everquest's early days people went to East Commonlands and inside a long tunnel would be 100s of players buying and selling their wares. In Dark Age of camelot again crafters could be found around forges and spellcrafting tables selling their goods. Also vendors at the houses sold stuff while they were offline. Entropia Univers has another really great way of selling goods similar to Ultima Online where players opened up shops in malls and players would roam around the mall and see what everyone had for sale.
Also you actually had to advertise in order to sell stuff. in Ultima Online I used to drop recall runes for my shop around the banks in popular cities. People could pick them up and recall to my house and buy from my vendors. If you didnt have a house like I said earlier you stood around banks or crafting areas advertising your wares for people to see. But now everyone just goes to the Auction House and 5 seconds later a trade is done. You never see the person you are buying from. You never visit several shops looking for the best deal. It doesnt matter if the guy selling the item is a bad player because you never deal with them face to face. You just click on AH, type in what you want, and BAM its in the mail or whatever. Its like they want to remove the multiplayer from MMO and just make them all first person shooters with an AH.