I am a bit mad about maps. Especially the online, interactive ones. When I heard about the OS (Ordnance Survey, rather than operating system!) open data Masterclass, I signed up for it immediately, very curious to see how OS data could fit in with online mapping applications.
(Image Credit: http://www.telegraph.co.uk/technology/microsoft/11480692/RIP-Internet-Explorer-Twitter-mourns-and-mocks-death-of-Microsofts-browser.html)
Internet Explorer. The bane of most web developers' lives. How often have we built a site and looked back content with our efforts, only to have that satisfaction whipped away when opening Internet Explorer?