After playing for all these years, Factions has become the best expansion of the series.
When this expansion had realeased, the original game had grown some age on it and the majority of players had longed for something new. The PvP had gotten redundent and boring but was still found entertaining. This expansion added plenty of new pvp skills and the oportunity to explore new Asian cities. Any player new to the guild wars universe will experience the same effect of playing it the day the update was released.
What's not to love? New pvp areas, new pvp skills, new pve everything.