As someone who hated the show, perhaps my dislike will spark your reasons for enjoyment:
1. The show was blatantly unrealistic, and almost nauseatingly so. These 30-somethings had absolutely nothing to do in their lives but crack corny, cheeseball jokes and engage in middle school humor.
2. The show was very, very "white". The humor involved prissy girls acting spoiled, as only could be seen in the local mall. "Cute" backstabbing which got resolved in a "cute" way. Girls getting worke dup over the most frivolous things - I was expecting an "boohoo, my BMW could a mud splotch this morning!" with Hahahah canned laughter in the background. Guys who were complete dorks, were seen as something of attraction, again because of their "cute" antics. Before you piss down my throat, go read about the people who love this show because they could "relate" to it. If you could relate to that campy, precocious humor, you probably grew up in a household resembling those in commercials for various household cleaning products.
3. Phoebe was the most tired role I've ever seen. It's amazing how Lisa Kudrow's entire acting style is just a rehash of Terri Garr's. Go watch a few things she's done, and you'll see the same exact role, played out the same exact way, just 20 years prior.
The only show possibly more annoying was Mad About You.
EDIT: Schwimmer "the whining moron" and Joey "If a goombah and a Jerry's Kid had children" are so incredibly annoying I cannot FATHOM how Joey is having his own show, and how people can "relate" to them.