If you're trying to decide whether to get your dad the Standard or go for the Collectors' Edition, it comes down to the packed-in extras. The Collectors' Edition has everything the Standard Edition does, but it also features an
Ancient Tartagon Mount - a two-headed turtle which matches the speed of your fastest mount and is only available in the Collectors' Edition, a
Bogling Wastrel, which is a unique pet that sets you apart from the other Ascended and a
Collector's Satchel, with a capacity of 24 slots. The inside tip is that bags of this size are hard to come by and make the game a lot more fun and less tedious - especially if your dad is the type that tends to collect anything of value when playing MMORPGs. In my opinion, the big bag totally makes the Collectors' Edition worth the bump in price.
Still not sure? Why not just get him the free trial and throw in a personalized coupon good for his choice of an Trial-Upgrade or a car wash/wax... Just please, don't get him a tie or socks this year.