Long, long time passed since last time I changed theme on my blog. What you see this time is Twenty Twelve from WordPress team. Maybe it is not yet finished but it works better than Carrington which I had before. Not to mention that previous theme was not updated for long time (I did few updates by hand with code from their Subversion repository but it was not comfortable).
This theme looks good on desktop, phone, tablet and I will use it for probably quite long time. Will update it to released version once there will be such one ;D