So, what is a short film? According to Wikipedia, there's no concensus, but the Academy says it's "an original motion picture that has a running time of 40 minutes or less, including all credits." Which sounds good enough to me. Anyway, I'm sure I saw a lot of animated shorts when I was a kid in the 1980s, but most of the time I didn't think of them as such, I just thought of them as segments on TV shows, most notably The Wonderful World of Disney and The Bugs Bunny Show. (Of course, some of those segments may have been created specifically for TV, but many of them were much older theatrical shorts.) So I'd like to rewatch a lot of those old things someday, and write reviews. And there were probably a bunch of old theatrical shorts from Disney, Warner Bros., MGM, or other studios, that I haven't seen, and probably should. But there are also certainly lots of short films I've never even heard of, and which aren't part of any familiar franchise or studio. Most of them I probably wouldn't even be interested in, but... you never know.
More recently, there was the 2000-2002 Sci-Fi Channel anthology series Exposure. I have reviews of a few of those films here, but there are plenty of others from that series that I'd like to see again someday, and write reviews of. Even more recently than that, there have been short films (either theatrical or as bonus features on DVD/Blu-ray) accompanying movies from studios like Disney, Pixar, DreamWorks Animation, and others. And lots of shorts I see in web anthologies. Of course, there will always be lots of short films I never even hear of, but I'll do my best to watch and review as many as I can, if I do hear of them.
Note: I try to list exact run times next to the title of each film in my reviews, but some shorts may be available to watch on different sources, e.g. YouTube and Vimeo, and the exact length of the film may differ on each source, either because one site has left out at least some of the credits, or because they've added some content of their own, etc. But in general, the number I list will at least give you a ballpark idea of how long a film is.
Aside from the usual sites on which I check for potential links for my reviews, there are various sites specifically dedicated to short films that I also check. These include:
Film Shortage, Films Short,
Omeleto, Short of the Week, shortfil.ms.
(I may include other short film sites as I discover them from time to time.)