The Justice Gundam from Gundam SEED! Admittedly, SEED was not my favorite series, but I did like this design. It probably has a lot to do with the colors.

I built this one about a year and a half ago as a gift for my brother's birthday. It is probably his fourth or fifth favorite, but I couldn't find any of the others at the time. :X He still has it, so I think it worked out!