Of course it's a matter of opinion. Anyone who has been inspiring to you in 2013 can be nominated. Submit your three nominations and designate your vote!
Osta
His GU team "Ducati FM?" has made a bold statement and contributed to both leagues, as well as inspiring others to speak up such as the "Gu fm?" team in Ducati.
SillySir
SillySir organized the GU Silly Cup that was almost completed this year [blame Colormad] in spite of poor assumptions made about GU players' preferences and schedulability. He proved that non-Riker players were equally willing to assemble for a friendly competition.
Snake12534 (who my vote goes to)
The most improved troublemaker of the year still keeps the admins on their toes. Snake leads Reptiles, the most active team. He and someun have given the other dynamic duos (orbit/morning glory and zac/yvaika) a run for their money.
Here's a haiku about him:
No one asked for it but here is my shortlist:given 3k lag
Snake run with enemy flag
coefficient drag
An SQUERRILz
King of grammar and inventor of the SQelo PvP rating system. His GU match predictor outperforms leading expert Zac.
red-der
red-der made his mark in Ducati and GU having played for the top teams. His proposed "A new matching variant for GU league" and brought out the true colors of the community. His quitting the leagues in 2013 has made a noticeable impact on league atmosphere and activity.
kierra and frank the tank
Perhaps the dynamic duo within the GU admin team, their activity is necessary.
allejo and brad
allejo worked on the autoreport plugin, signed up as a dev and is working in the background for OpenLeague. I don't actually know what brad does.
Runruns
Runs is an active member who is admired for his lighthearted presence.
Constitution
Organized the HiX Doubles Challenge.
khonkhortisan or zar
One of these is probably the most relatively improved player of the year.