While I'm not that much of an old timer(33,started at 16), I just recently started re-marking the white when used as a "hot". The code says permantent and durable marking, so I use a Sharpie to color the wire. I'm affraid some inspector will say that tape isn't permanent or durable enough.
I recently had a customer call me that had tried to wire something with out me. They couldn't figure out why the breaker tripped every time they flipped the switch. Upon inspection I found that she, yes she, took appart a j-box and put it back with all whites together and all blacks together. She couldn't understand why a white was supposed to be with the blacks. This is one reason for the need to mark the wire.
