Well perhaps some people do. Let's see what the poll says in a while.
I'm never bored on a plains map and like the variation they bring, compared to overplayed maps like Ruins and Field by the River, biased camp maps like Village and all those village maps. I'm just absolutely bored with those. And to say that a plains map is unbalanced? Hah, check how unbalanced most default maps are! Compared to that (villages and camp towers), a hillcamp is hardly a defence. Nothing a good surround can't handle.
Flat plains biased because one side has more cav? Hah, archer positions with a few pikes can deal with that.
Love some of the new maps, like the ones Mustikki made. They offer a welcome change, even though they are a bit heavy on the decorations, thus lowering framerate slightly.
But if i'm forced to play Ruined Fort one more time, i'll scream. I'm really, really bored with many of the default maps and i really, really like the variation most random plains maps bring. Fresh maps with random geography are fun. They make me think about what plans might work, they make my team want to try tactics because those are very effective on plains maps and it offers a bit of refreshing variation to most stale and overplayed maps.
But that's just my personal opinion ofcourse.