The first one I chose was Grossfungus, because I liked the colors, but the last stage didn't turn out the way I thought it would so I'll probably never use it. Then I went with the Weeping Angel one because Doctor Who - I'll probably use that one a bit, especially once I can afford the CW wings someone made to go with it. My third one is the one I'm currently using - Deathslug. I am so in love with this one.
I think Butterfly Bruise is the most popular. I got that one (BB) and Heartburn (my first ever zombie strain), Dolly Dreadful and almost done working my way through Carchari. Very happy I managed to get 4 even if it means I didn't get any biting done.
[img align=right]http://i.imgur.com/VS0ZIea.gif[/img]
Bubblejelly (random), Carchari, Crack Head and now waiting on Deathslug.
Aside from Butterfly, which I had (along with Experiment 893) until they introduced the new skin system. Such a pity we can't stack skins anymore.
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I got Death Slug, Bubble Jelly, Angler, and am working my way through Blistered Hearts!
❄️ Seeking Elsa or Olaf inspired CWs ❄️
Deathslug, Lovebug, Blistered Hearts, and Freckle Fever, in that order. c:

Grossfungus, BB, Crackhead, and (obviously) deathslug. LOVING THIS! Hope we get to do it again next year! :)
I unlocked Boobitis, Butterfly Bruise, and Crackhead. c:
Pinkie Patch, Crack Head, Butterfly Bruise, and working on Blistered Hearts :) I hope I'll be able to get more skins next year. I love making HAs too much to be a zombie all the time or to decide on just one skin. I can't wait until I can decorate all my zombie skins up anytime I want!
Carchari,Butterfly Bruise,Death Slug and just finished with Crack Head. Seeing all these awesome HAs makes me wish I'd picked Blistered Hearts at some point ><
I was a Butterfly Bruise zombie to start out with. Went for Boobitis because I've always liked it best. I decided to catch Blistered Hearts to help others out with the biting achievement. Releasing the old strains and turning them into collectable skins was an awesome idea.
I just picked Freckle Fever lol, it was really the only one that I wanted! I'll probably get more of the others next year idk
Heartburn. Eh, it was my favorite. I didn't take the time to unlock more but I hope this kind of event happens again next year.
I got grossfungus, bubblejelly, and eyesore. I would have gotten one more, but nothing really caught my eye. Was considering heartburn, pinkie patch or freckle fever but none of them I /really/ really wanted, haha. Eyesore is currently my favorite skin. ouo
Grossfungus for the new virus fun (I couldn't in the past because I'd held on to a zapper skin), Virus because it was my first ever disease, Deathslug, and lastly Pinkie Patch. :)
Like many others, I'm hoping the VIP comes back next year. I think it was a fun, interactive, and useful addition to Survival.
I got Pinkie Patch, Freckle Fever, Blistered Hearts. ❤
And then I got the Bubblejelly by accident. But am extremely happy with the previous three I got. giddy
I just got Butterfly Bruise and Crack Head but considering this was my first survival, I'm quite pleased. :)
I got crackhead.My question is how do you remove it and where? or does it just wear off?
I managed 4 this year, bubblejelly, freckle fever, lovebug and crack head...I'm loving the new wardrobe skins feature, using it a lot. :) Go to the beta wardrove, on the top of the page click on skins, save your new skin in there, then go back and click on the choose none. You will not have it anymore but you can wear it whenever you want by going there and under skins, click on the one you choose to wear. Hope this helped you.. :)