I was just thinking it'd be nice to have the profile more personalized with stuff like birthday.

If you want that on your profile, just put it in yourself in your player bio.

Pretty easy answer.

I think he means to note it as an important date

eg) Date you joined Warlight is listed
Date you became a member is listed.
Date you played 1,000 or 2,000 or 3,000 can be listed (i think)

Of course you can add it to your Bio but to have it in a more formal spot alongside all of this:

Joined WarLight: 6/28/2012
Member since 8/14/2012
Currently in 6 multi-day games
Played in 3609 multi-player games (66.2% real-time)
Last seen less than 15 minutes ago
This player has been booted 71 times (1.9%)

I'm not saying just birthday and such but I think it would be interesting to add even more ideas underneath this list like overall winning percentage and even # of forum posts

Zero interest in any of those datapoints. Birthdays are pointless (this isn't facebook), overall winning percentage is already provided (and is meaningless) and forum posts are meaningless.

some people like this stuff...

also its my birthday on the 19th if anyone cares

Birthdays? Why don't we all just get an apartment together while we're at it.

Don't really need you guys knowing any more about me than you already do.

Yeah, if you want it on there put in profile. Personally I think there should not be all that information unless the person wants to share it.

Where is the overall winning percentage?

"Completed 664 ranked games (380 / 664)"

Right above your ranked game listing