This is why I am liking the 32g. It heats up instantly and my batteries last for more than 24 hrs.
My problem with 28g (Which seems to be the most popular) is the amount of time it takes to heat up.
If you built two coils of the same ohm, one with 28g and one with 30g, the 30g coil will heat up faster. The wire itself has a higher electrical resistance so it will heat faster even though both coils have the same ohm reading.