Hey,
I recently started to level a monk first as windwalker but then I felt like windwalker is the most boring specc I ever played since vanilla....not even arcane mage, hpala and frost DK can be as boring as WW monk for me.
I respecced into brewmaster because healing isn't my thing and I noticed that BM monks are quite OP on lowlevel just like every other tank and I wanted to make him a twink anyways.
70 Twinking:
More players
Could play arena
No PvP gear for Monks so I would have to pve gear with resilience gems which puts me at a disadvantage
More abilities such as healing sphere and ox statue
Less OP tank scaling on higher levels(?)
60 Twinking:
Easier to gear up (Rogue T3 from BMAH)
No resilience so no disadvantage as a monk
No arena so could get boring
So I'm kinda unsure about what level I should play a brewmaster twink for mainly pvp.