We have had a uZa guild for both games for 11 years
There were 72 people in the first guild, though some of us had 2 accounts.
Myself, Eagle, Mi, CG, D Day, Kenshin, Parasite, Artemis And Shadow are always lurking
Guild Wars prophecies is still the best, it has 3 expansions but is quiet these days, though they said the servers can stay up for ever, which is nice.
I can't see Activision ever doing that.
I sadly have over 6000 hours on the original and that is just on one account
Guild Wars 2 core game is now free, if you want to progress then you will need to buy Heart of Thorns at some time.
Original Guild Wars has a free trial.
http://gw1101.gtm.guildwars.com/freetrial/There is a lot to learn in both game. Building your char to do certain things, the skill sets, Armour etc, but that is all part of the fun.
There is alsp PVP and world versus world battles.
WvW is server vs server taking other guild castles and stuff
In Guild Wars 2 we are on the Sorrows furnace server.