Thank you - though, that would require me to build "checking my favourites" into a regular routine to remember to look for replies (and, more than that, I'd need metadata or brainpower-expenditure to distinguish "this is a comment I favourited because I want to check for replies" from "this is a comment I favourited to refer back to later"), whereas this approach "just works" with my (all-too-regular :( ) habit of checking replies-to-my-comments.
Though if this is considered a particularly irritatingly selfish behaviour, I'd consider stopping! I don't _think_ it particularly negatively affects anyone, but I'm willing to hear otherwise.
I think it is frowned upon a little bit because notes about wanting to check back later do not contribute to the conversation. But I think occasionally making those kinds of comments is ok, as long as the vast majority of comments that a user makes is contributing.
Fair, thanks! Implicit in my "I don't _think_ it particularly negatively affects anyone" was "I don't believe that seeing occasional non-contributive comments are a strong negative effect", but you're right to call it out explicitly.
I find those sorts of comments irritating. Why not just keep the comment open in a tab, and check back on it when you have a chance? Is it necessary to spam the discussion?