I'm about halfway through my first Giants story playthrough, and while it's obviously a step down from Swap Force in polish and presentation I'm finding it well worth playing through with strengths of its own. Vicarious Visions did a great job polishing the engine and style of the series with Swap Force, but I have to say even just halfway through Giants it seems like it had a little more personality to it to balance its rougher edges. (And surprisingly not missing jump as much as I thought I would!) Really loved the giant rock em sock em robot level and the heroic speed challenge with the little singing dudes so far

Anyways I've now started thinking about finishing up the series backwards, but I'm a bit bummed about Spyro's Adventure because it's not available for Wii U and I would have to play it in Wii mode and in non-HD. I'm not a huge stickler for HD but I think the uber pixelation might bring the experience down for me. Is it still worth picking up and how does it hold up over Giants? And it's definitely not available for PS Vita is it?
The other question is, I picked up Skylanders Swap Force for 3DS and was kind of disappointed in its style of gameplay and graphics that felt like a lite version of the console Swap Force, but heard the earlier iterations on 3DS had their own more distinct and better gameplay. With that in mind should I give Spyro's Adventure or Giants on 3DS a go if I'm looking to spend some more quality time in the Skylanders universe?
I realize these questions are about the other games in the series, but I was wondering what you guys might recommend in hindsight after having played them all including Swap Force. Thanks in advance!