I started Firefox theming in 2005 as a way to put something back into the "Open Source Community". That was glowyred and I got a lot of requests to do it in blue, green, pink, purple etc. In doing glowyblue and glowygreen I learnt a lot of things that meant I had to deprecate glowyred in favour of a new theme that became glowywine.
Since then I have created glowygold, Arctic Glow and flaminglow. I've made each of these fairly monotonous for a number of reasons.
I set a goal to have all my themes on Firefox 4 by March 2011 which I have achieved. I also promised to resume support for Thunderbird and as at 2nd of March 2011 have submitted each for AMO approval.
It has been quite a work load to achieve this but a challenge I have enjoyed. I hope many of you get similar satisfaction from the results.
At this stage I am cross testing with Firefox and Thunderbird Extensions for issues such as readability.