What I've most commonly seen people do on AO3 is to bundle a group of sketches or drabbles into a single work, and post individual installments as chapters. There was someone in A:tLA, for example, who had her drabbles collected in batches of about 30 or 40 per individual work.
I find this works very well for me as a reader or viewer because, as well as not flooding my reading page, I like to use "view entire work", let the whole thing load, and then see them all at once. But you'd also have the option of viewing one at a time on a slow connection or a small screen.
For my own reading/viewing preference when I'm going through the archive, I prefer to have them separated by fandom, but I can also see grouping them by other criterion (for example, all the drawbles that you did for a particular post on LJ being posted as a single work regardless of fandom); that makes sense to me as well.
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I find this works very well for me as a reader or viewer because, as well as not flooding my reading page, I like to use "view entire work", let the whole thing load, and then see them all at once. But you'd also have the option of viewing one at a time on a slow connection or a small screen.
For my own reading/viewing preference when I'm going through the archive, I prefer to have them separated by fandom, but I can also see grouping them by other criterion (for example, all the drawbles that you did for a particular post on LJ being posted as a single work regardless of fandom); that makes sense to me as well.