If you have a good look around you will find there is plenty of positive posting happening on here :)
Of course Serious Board isn't where you will find it as it's for people who are struggling a lot.
My suggestion would be for you to set a good example by posting positive things as it might inspire others.
As to the title of the website, I think recovery itself sucks a lot of the time and that for many it's a huge step forward to just try getting better or reach out for support.
The SUPPORT boards are called that for a reason, so surely threads asking for support will always dominate.
Like I said, if you want to see more happy posts go ahead and make them :)