I use WordPress daily in my own business as well as most of the time our clients also choose WordPress and ask us to build their website based on WordPress.
I cannot thank enough to WordPress and whole WordPress team to make this great product open source and free.
I learn something new daily about this great project of its own kind on the internet.
Just today I installed Android App by WordPress and really loving it, this makes posting to my blog so easy.
Also today I was sharing with my team that MEDIA section in WordPress 3.5 is so lovely. Oh also those new Publish and Update buttons also so cool in WP 3.5.
Thank you WordPress, thank you very much. Wishing you all best year 2013.