I agree that this is a good idea. However, more poses mean TONS of work for the Gaia Programmers. Personally, I would like to have the "Hands Behind the back" pose and the "Single hand on the hip" pose. I wouldn't mind a "Double outstretched arms" pose, that would have both arms in front of you like a Zombie or a sleepwalker. Sadly, I do not think this will happen until the next avatar system is created, which would likely be years.
Until then, I support your efforts by signing this petition.