I do a similar thing. I also have a variety of objects under my desk at different heights so I can rest my feet in different positions and do whatever feels com

I do a similar thing. I also have a variety of objects under my desk at different heights so I can rest my feet in different positions and do whatever feels comfortable. My desk isn't adjustable (atm) and one of the biggest (but unexpected) benefits of standing at my desk is that it tires me. After two hours or so I am forced to go have a sit down _away_ from my computer. This helps my productivity more than trying to take regular breaks when sitting as I find it harder to waste the time browsing the internet or simply skip a break.