Both styles are beautiful. I can't decide which style I prefer more.

The animation style of hair in CGI way more better. You can see the CGI hair is far more smooth, more detailed texture and highlight, and far more natural, you can see it on all of CGI Princesses (Rapunzel, Merida, Anna, Elsa, and Moana).

Meanwhile most of 2D hair are tend to be plain for me. Some of hair are animated good (ex. Aurora, Ariel, Pocahontas) but some others aren't. And they have less detailed texture.

i prefer CGI animation for hair. They are so detailed and brings out the texture and depth. Though i like hair in 2D also - Aurora, Ariel, Poca...but CGI is amazing.

both really

I like the CGI hair more, and I agree with Anukriti2409, it brings out detail and texture.

I prefer 2D animation in general but for hair CGI is much more beautiful.

I like the 3D texture in grass, in the background details, and in clothes with CGI. The CGI hair for Disney is just awful ( rough and twiggy up close), and bland or messy ( when farther away). The hair of the 3D princesses looks like Fiona's from Shrek. It looks like the hair in How To Train Your Dragon. In general, CGI hair does not look soft. It doesn't look pretty to me.

And, along with plastic-looking skin, that's what what really bugs me about 3D animation in general. The hair looks "off," no matter how many vantage points I get to see--- and the skin keeps looking like plastic dolls.

At least, I don't get that same "jarring" effect when I look closely at 2D animation. With 2D, the hair is distinctive from the clothes; what is fabric thread doesn't resemble hair; what the trees look like doesn't resemble hair, and whatnot. After a while, the same animation used to make tree "spines" on a fir tree shows up randomly as somebody's fur or someone else's hair in 3D. Now that I've seen...gosh...so much of it, I notice the sheer laziness of 3D. 3D gets repetitive and tacky, and forgets to make distinctions anymore.

both!!!!

It can be so much more detailed!

The detail is much better, and while 2D hair can be animated very well, CG tends to be great.

I love 2D animated hair, but generally not Disney's - I thought Dreamworks did a better job making 2D hair look more realistic.

CGI character design is usually too "uncanny valley" for me, but the hair is so much more lifelike and looks more like hair than the unconvincing blobs of color on top on Ariel or Jasmine or Cinderella's heads.

Ariel, Belle, and Jasmine are my favorites! But I love Rapunzel and Elsa too!

elsa hair best

In my country we like Ariel, Cinderella, and Snow White most with flat hair. Elsa is now popular.

The detail and texture are exquisite in CGI hair.

Now for eyes, that's a whole different story.

IMO, making hair CGI automatically means making the hair act more like real hair as well as look more like real hair.

This leaves less room for epicness (such as that demonstrated by Pocahontas' hair during that last scene on the cliff) ;)

And I'd rather see hair that looks epic than hair that looks realistic.

depends