When I'm online mostly:
18:00 - 20:00 AEST

When I'm playing
20:30 - 24:00

When not to be disturbed
Online - Able to chat, trade and play
Away - Not able to chat, trade or play
Busy - Able to chat (short conversations), not able to trade or play
When playing TF2 or other games - Short conversations (unless playing with you), no trade or invite requests (unless you really really need to or want to)