Hmm..another server change? That's gonna mean work for an admin.
Anyway, elaborating on what Hellblazer said.
You can have different gametypes: CTF, CP, ZF, PL, KTF
Edit: Arena
And Server Settings: Crit, No-Crit
Edit: Teamtalk, Alltalk
And Maps: Stock, Custom
And votes: RTV, RTD, Votescramble, Nominate, Votecrit, Votemelee
Now one thing that I think isn't right is leaving out a map just because under 50% of people don't like it, like Hydro. That's were dynamic change on the part of the current community comes in, aka voting.
We need more votes! RTV, RTD, Votescramble, Nominate, Votecrit, Votemelee. We've already got most of those, but I think the cooldown time needs to be lowered, especially on rtv. And of course you can't have every vote on specialized servers.
We have 4 servers at our disposal, publically, so I suggest:
Server #1 Pro Server (Pro like Chro)- Totally Pro, TFTrue, nothing random (or unpredictable), just for people who want to play pro.
Edit: 8 Man
Edit: No kill-cam
Edit: Teamtalk
Maps: Well liked and known stock and custom maps. Keep the selection limited.
Options: Votescramble option, rtv (lower cooldown), nominate
Server #2 Regular (think of a more creative name)- Just TF2, for people who want to play TF2!
Edit: 32 Man
Edit: Teamtalk
Maps: All Stock, selected customs
Options: Crits, Rotating CTF, CP and PL, Sudden Death (I loved that, and think a lot of people did! Maybe even melee only sudden death, just for fun

), no voting the crits off, I don't think. Rtv (lower cooldown), nominate.
Server #3 Specialized Server - One Gametype, Rotating-Gametype One - CTF
Edit: Teamtalk
Maps: All CTF Maps
Options: Votecrit, RTV, Votescramble, Nominate, Votemelee
-Gametype Two - ZF
Maps: All ZF maps
Edit: Teamtalk
Options: Votecrit, RTV, Votescramble, Nominate, Votemelee
Server #4 Nom Nom-Just nom nom, as it is now.
Maps: Well, you know
Options: Everything!
Edit: I was totally just informed that we in fact have *five* servers. So in My master plan, the fifth one would stay as arena only.
But these are just my suggestions, anyway.