Oh yes TVTropes is addicting, I use it largely for anime stuff aswell, I can look back over some favourite series and look at the tropes, then a particular trope catches my eye, so I open it up in another tab, then within that another series catches my eye, and before I know it I have to make sure I read and finishes pages so I don't have too many open. I also have it favourited.
It is good for remembering some good bits, and matbe find things you didn't know before. Also dureing the runs of certain shows, I like to see how the pages of particular series change as the episodes come out, for example I have lately been checking up on the page of Angel Beats to get an idea of what others like in it. Or the recent Baka Test also filled me in on some of the differences in the novels/manga and confirmed my opinion of the theme songs.
The one trope I usually check out for particular series pages is "Crowning moment of Funny" which more often then not has a great highlight. The urge to look at it has returned with writing this, I guess I could just take a peak at a few series, hopefully not spend the entire night doing so.
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Through dream I travel, at lantern's call
To consume the flames of a kingdom's fall