If Telltale isn't at least thinking about bringing The Walking Dead to the Vita and/or 3ds then I'd be a bit disapointed. The game's visuals are not that hard to run. It'd run just as good on the Vita and probably 3ds as well. Also I think the touch controls are perfect for those quick-reaction decisions you have to make. Both consoles have are able to feature downloadable content so you could sell them by episodes as well. And certainly the game will sell more than on consoles just because the instal base is so large (mainly on 3ds). 

Thoughts about a portable version of TWD?

They already have it on iOS, so I don't see why not. But I think if they were going to, it would already be on Vita and 3DS already

I'd love for it to be on the 3DS.

I'd love to see the sequel on PSVITA, it could do a lot of cool stuff with the two touchpads a long with the DS layout.

Why not? Both conoles need good games right now, I think TWD would fit them perfectly^^

Why not, but more important - for the developer, not for me, I don't care about the game - would be to release it on Wii U's eshop.