Out of the following six anime, which one should I complete first?

I guess this could have also been done on the số phiếu bầu but yeah I didn't feel like going to the phiếu bầu section...

Either way, I want to finish up watching some of the series I either started two years cách đây hoặc the ones that I have been currently watching. I just want some opinions on which one I should finish first.

Here is my list:
-Soul Eater*
-Trigun*
-Code Geass*
-Shiki
-Durarara!!
-Panty and vớ, thả, còn hàng with Garterbelt"

*These were the three I started three years ago.

"I know one of the most obvious các câu trả lời is to finish the shortest one first. Well, I might watch P&SwG along with the other series as well since I only have 5 thêm episodes left of it.

Thank bạn to all of bạn who have answered. I really do appreciate it. :)