I avoid lounges that are crowded. Empty lounges might be nice to kill time and some are truly elegant and luxurious. I remember Korean's lounge with restaurant food at Incheon and Cathay's at HKG or Turkish's at Istanbul. Most of the time I prefer to sit in visual distance to my gate to keep an eye on the inbound flight landing on time, staff preparing things and such - that's if there are power sockets available.