Yoshi stated before that we would get some kind of "reward" on our character that "You can tell from just looking at the character" that we participated in this special story line. I think that's kinda cool. (I been around since Alpha but remade my account buncha times..oh well.)

Although the playtime achievement sounds nice. Hrm..Aion have rewards like this..(or more) each month or so..they give out a reward, the longer you stay the more cool stuff you get (Like special wings, really cool items and stuff as a thank you for people who have stuck by all this time) I used to look forward to it. I doubt SE would implement something like that (From my experiences with FFXI...but you never know?)