it depends for me on how i feel that day.
Mainly i try to keep 30 to 50 bb's minimal when i enter.
but i have had good sessions when i enter last minute with just over 15 bb's.
In Turbo i find it more important to register with a good stack, slow tournaments like the bigger or deep stack's are good to go in with low stack and wait for the right
hands to double up a few times.
my best results i get with late reg. also live, say i usually step in with level 4 to 8 and just wait for the good hands to play. after i have stacked and seen the others play a little i can loosen up.
i rather don't like first minute start because of all the cheap ass suck outs, fishes and donky's. I rather wait half n hour to an hour so they are out or sollidly stacked so they can make mistakes and build your stack.
greats