Speaking as another member of the "only one " club, welcome aboard.
I think you have me beat on available costume changes though.
Writer of In-Game fiction: Just Completed: My Summer Vacation. My older things are now being archived at Fanfiction.net http://www.fanfiction.net/~jwbullfrog until I come up with a better solution.
543 hours. Wow. Just wow.
Skeet, my Grav / FF had something close to 700 when he finally dinged 50 at the end of 3+ years.
And Gavving, Congratulations! Any plans for your next project?
Working on a Peacebringer at the moment. Finally get to play around with one of them. That and I'm kind of liking the Mastermind I started, wow talk about ez mode. 
Well after 5 years and change my Storm/Dark Defender just made level 50! (and is my first and only 50) Granted I took some long times off, but still that's a long time for leveling...
543 patrol hours
460 times on patrol
58 unclaimed free tailor sessions
2 free unclaimed respecs (not including the vet rewards)
Maybe not that big of a deal for those that have tons of 50's but it's a first for me.