Want an active WvW server
Maguuma has a hard-core active WvW organized community.
Our only major issue is numbers. When we fight zerg servers (they have a full server), we are forced to organize and limit how much we can hold. But, this gives us lots of teamwork. We have a free Maguuma server communication system (Mumble), so everyone who plays WvW can organize and talk to one another.
Give Maguuma a shot.
As you can gather from the threads here, this is going to be an ongoing problem until the transfer policy is modified, since there is really very little that differentiates one server from another (although as a TC-er, I have to plug our server for perhaps being a little different). I think for your situation and wishes, you should try a server that has recently received a lot of guild transfers such as blackgate and Sea of Sorrows. It’s more likely that guilds stability will be a bit better on theses servers in the short term, since they just got there and there is some tailwind in their recent performances.
If the transfer policy doesn’t change, however, you should be prepared to transfer every couple of month or so (if not sooner). That’s just how things are right now.