Personally for me, the most "Bitcoin-ish" things I have ever done is spending 27 days, 11 hours and 23 minutes minus AFK time on Bitcointalk to obtain the rank Legendary. With the hope that one day I will be able to put it inside my resume - alright, just kidding.
What's the most Bitcoin-ish things you have ever done?
eg. laszlo for being the first person to buy pizza with Bitcoin
Now the period, if spent the same way it won't earn you that rank. Thats one of the advantages of being an early forum member.