Most of the categories in my movie reviews section are specific genres, or at least I usually try to make them so. However, I'm generally against considering animation a genre unto itself, because it just ain't so. Cartoons can be made for any age group, they can be dramatic or comical, they can fit into any live-action genre you care to name. So why put it in its own category, instead of spreading specific animated movies amongst the other categories based on genre? I dunno. Maybe just because I like them so much. Which I reckon is a good enough explanation.
See also anime, short films, animated series, animated TV movies, animated webseries
And animated movies I want to see: cel animation, CGI, and other animation
Anyway... the list of animated movies I'd seen was getting pretty long, so I eventually decided to separate it into separate lists:
By this I basically mean traditional animation. To be honest, I don't know much about the actual process of making animated movies, so it's possible some of the movies I list under "cel" were actually made by some other technique. So if I'm mistaken about any of this, I apologize. (And of course, many movies that are mainly made with traditional animation may incorporate a certain degree of other animation techniques.)
Computer animation, like traditional animation, can surely mean lots of different things. And it can have lots of different "looks," though most of the movies I list under "CGI" will have a similar enough look that... you know what I mean by that term. Of course, some movies that use computers are specifically trying to achieve the look of other techniques, like claymation or cutout. (The "South Park" movie is an example of the latter effect, and I wouldn't be surprised if a lot of people erroneously believe it actually is cutout animation, rather than CGI.) Computer animation has also come to be used extensively in live-action movies, which I won't list here.
Flash: This is a form of computer animation, but it's not really my idea of "CGI," and since it's a lot less common than movies that I do think of as CGI... I'm including it under "other," both to distinguish it from those films and to save space in that section. (Anyway, Flash is much more common in web animation and TV animation... and in fact there are a lot of shows I'm surprised to learn are Flash animated. Some of them really look like traditional animation to me, and not even like my idea of what Flash animation should look like.) There are also some non-Flash films that use Flash for individual sequences, which I won't list in my "other" section. (But Wikipedia lists them.)
motion-capture: Technically this could be included under "computer animation," but it has a very specific look that sets it apart, so... I wanted to list it separately. This tends to be the type of animation most associated with the uncanny valley. Like CGI, motion capture technology is becoming increasingly common in live-action movies (such as The Lord of the Rings and Avatar).
rotoscoping: this is something I have seen very little of, and I think of it as being a little too "live-action" to really count as animation. So, the couple of rotoscoped movies I have seen, I put reviews for in other sections. But now that I'm making all these subheadings, I might as well include links to them here. It is, btw, technically a form of traditional animation... I guess. But, like motion capture, it has a distinctive look that sets it apart. (Some movies may even combine techniques like rotoscoping, motion capture, and CGI.)
stop-motion: Probably most or all of the movies I list under this heading are claymation, though I rarely think of most of them as such (just because I tend to have a specific idea of the look of claymation, which mainly means things like "Wallace & Gromit"). But I am wrong to think that way. Another type of stop-motion is cutout (I mean real cutout, not CGI cutout, as mentioned earlier). Other types can use models, puppets, or other objects (and this can be done to some extent in live-action movies, particularly fantasy or science fiction), though it shouldn't be confused with models or puppets that are filmed in a non-stop motion way (such as Muppets).
Anyway... there are some movies that may involve more than one type of animation, and when I'm aware of that, I'll list them under both headings, but I may miss some. (It's also possible I'll list some things under two headings erroneously or unnecessarily.) I should also mention that a few of the movies I list under any type of animation may also include live-action elements. The prime example of this is "Who Framed Roger Rabbit," which I sometimes think I should move out of the animation category altogether. (I did move a series of CGI-heavy movies, "Arthur and the Invisibles," from animation to fantasy.) But... I'll make such decisions on a case by case basis, since it's hard for me to come up with some absolute rule about, like, ratio of live-action to animation. (But generally speaking, if a movie is mostly animation, as with "The Phantom Tollbooth," I'll include it in the animation section. And if a significant number of characters are animated the whole time, even if other characters and even the setting of the movie are live-action the whole time, as with "Roger Rabbit," I'll likely include it here. Especially if the animation itself is integral to the plot, rather than just being the medium of the film.) And... I guess that's all I can think to say, for now.