We now have a few theme options to select from, if the default one doesn't suit you. There are two "minimalist" themes without the wood background, one without the guitar graphic; both are suitable for work environments where you don't want prying eyes knowing that you're goofing off. There's also one with the wood background just in the header area.
To change themes, bring up your profile, click the Edit Profile button, then the Settings tab. Scroll down a ways and you'll see "Forum Themes" listed in a drop-down.
I had no bucket list so I picked up the guitar... and my life changed for the better.