While Storm Atronach is unchanged the other two atronach forms changed, i think, to the worst. Flame Atronach in Skyrim is a rather unimpressive summoning in appearance. Frost atronach is huge but i never understood why they didnt made him having a human-like appearance. Why did they transformed him into pyramid head? It doesnt make sense. I hope in a future TES the design of atronachs to be better

Kind of makes that one romance between Molag Bal's daughter and that Frost Atronach a bit weird to imagine with its current appearance.

Everything gets a redesign. You learn to get over it eventually.

While I do think that the flame one is pretty uninspiring, I like the frost one.Yeah, pretty much this too.

I believe the designs in Skyrim are superior to those in Oblivion.

I like the Flame Atronach's design, the Frost is a bit to amorphous for ice, in my opinion...

I preferred the frost in Oblivion, but I like the other two better in Skyrim. Flame Atronach's appearance isn't really that much different from Oblivion to Skyrim aside from one having a puffy firehead, and the other one not having a puffy firehead.

Although I do think Morrowind still has the best Storm Atronach in the series, which is a relief considering how bad its frost atronach was since it was basically blue-diaper-man.

I love the Flame Atronach's appearance in Skyrim. Much improved over the Oblivion's design. Look fluid and frightening. The Ice isn't my favorite, but I got used to it. It does look menacing.

I like Oblivion's Frost Atronach and Skyrim's Flame and Storm Atronachs.

My two cents:

Best Frost: Oblivion
Best Storm: Morrowind
Best Flame: Skyrim

Off-topic: I miss the Iron and Flesh Atronachs. Hell, I miss actually fighting Daedra.