If you're looking for a mature crowd + active PVP, you should check out Sunrest. Generally speaking (with a few exceptions), I find RP servers to have a more helpful community and what not. There are a number of Defiant guilds that have cleared pre 1.3 content and a number of up and coming Guardian guilds that are stepping into raids.
Looking forward to seeing all these guilds move forward. Really starting to see some good interaction between guilds too. So if you are looking to transfer, check Sunrest out!
Also, shameless self promotion here, check out DOOM guild Guardian side on your arrival if you're looking for a home of friendly people. =)
What is your raiding schedule with DOOM?
No solid schedule as of yet.