Milestones used to be things like 18th birthday, 21st birthday, etc. Nowadays, it's the changing of scenery in the virtual world- moving from one social network to another, to another.
I'm scared to try to even think up my entire history of where I've moved my 'main haunt' on the web, considering I've been actively here since 1994, and in a limited form for about 5 years before that.
IRC was a big stint. So was Sugar's Place, a BBW chatroom/sex site (which is back, in a different format now). More recently, 1Up had a 'personal' area including blog, so I was there for a while. Then MySpace. Most recently, LostCherry (err, CherryTap... whatever).
Everything has its time in the spotlight... and that spotlight starts to fade, sometimes faster than others. I remember the staying power of IRC and Sugar's. (Oh, and Aardwolf, the biggest time-waster of the past 10ish years, but it's still got some magic left.) !Up got too slow and was generally filled with idiot kids that were born after the NES came out. MySpace- four words: 'Sorry... an unexpected error...". And now CherryTap. CT friends will know what went on there. (The story's really not all that interesting, but it's enough to have driven me away with a relatively sour taste in my mouth.)
So, here I am. I don't know if I'll try to change things up a bit w/ the layout, how often I'll post, or anything like that... but hopefully people will keep in touch, while I'm here, and once I move on to the next major milestone in my Internet (lack of) life.