As far as I recall 1.1 will have some balancing improvements regarding maps allowing to pick a map list according to the number of people on the server.
Roster of big maps (Backwater, ElPaso and such) will be picked when the server is full. Roster of smaller maps when there's less people. This should encourage more variety between maps and during "rush hours" on Jeux less popular (which doesn't mean less good) maps should be picked.
Until then, when I am on the server (my presence is easily recognized by people writing "donnie donnie donnie donnie donnie" every 2nd line) I can turn voting off to let people play some different maps. I do it pretty much daily for a couple of hours but I can't leave it that way when I am not watching because players should be able to kick a TK or change a map via voting if they want to. Typically we have a run of 3-4 maps of medium popularity like Cobber, Santa Cruz, Farm and such. Then I put votes back on and they can go back to Mexico, Durango, Mexico, Alamo, Mexico, Durango, Mexico routine.
The bottom line is I can't really MAKE players play maps they don't like for extended period of time.
I mean, I can listen to pleas of people who are unhappy with all-day Mexico enforce it for a few maps but 2-3 hours without Mexico will have riots started.
You should keep complaining about being sick and tired of Mexico, convince other players and win those votes GUNS clan is putting forward all day to play Mexico again. Convince the players to your point of view and the problem will disappear just like the problem of Durango disappeared a while back to become a SantaCruz problem and then transform to current a Mexico problem.
Finally, don't forget that SG is on the low side of system requirements and many people with weaker computers play it for that very reason. Some maps, most notably NewTown, DawnFort or even Alamo are very hungry for resources and lag for them considerably. So when Alamo is on, they have a choice of voting for less open maps like Mexico or Santa Cruz - or leaving until the map rotates back to those which they can play. This applies to GUNS clan members who typically lead the charge when voting for Mexico.
I have to take those folks under consideration as much as I take you and other players who are bored with Mexico. They complain too when a map they can't play is running. And they can't play quite a few.
For map makers and developers: It's worth considering when you are making a new map that SG is popular among many people who aren't able to play too complicated ones. Keep it simple if you want to make next Durango, Mexico or SantaCruz.
SG names: Bodie (aka mS // Donnie).
Admin on Jeuxlinux, RAWHIDE, #sg.wars and some other servers.