I like the Ziggs one... but I like Zigg's bomb theme more than throwing snowballs. The angry snowmen are just ingenious! But I'd miss his explosives too much. The fiddlesticks skin is very well made. Tried it on the PBE, its what his model SHOULD look like all the time instead of the stiff and choppy one he has now. And the blizzard animation and all the spell effects are dastardly! And the Veigar one's just perfect. Gotta love the recall.
They all had far more effort put into them than the past skins which just stuck some clothes on unmodified character models without changing any/many spell effects. Saying the old ones completely overshadow these ones seems suspiciously biased.