Which faction is more popular here? Do more people play Horde or Alliance? I know in general Horde is the more played faction, but what about for this group?

Eh, I play both, but I probably spend more time on my Horde characters.

Technically I'm bi-factional, but yeah, I also spend more time on Horde. Just more fun to me then Alliance.

The Horde for Tauren & Forsaken.
The Alliance for Worgen.

Playing horde for the upcomming Zandi-troll (gotta have a shaman from the original trolls)
And playing DH as Night Elf, because the Illidan Stormrage was one.

So depending on the class and the lore i guess.

I play both factions, as I like a lot of characters from both sides, but my heart and main are of Alliance, as their ideals are more align with those I try to follow in everyday life. Aaaand they don't nuke anybody, or commit genocide via fire...

Have characters from both sides, but the races I play on Horde tend to resonate with me more, so I play them more.