Not exactly a TAAT but as we're talking about people who witter on about their totally random pet obsessions, do you fancy entertaining me (while I lie here suffering off some hideous lurgy) by telling me your pet thing that you witter on about?
For me it's probably animals. I find it really hard not to share the fact that I have seen a red kite/a woodpecker/next door's cat today. I'm so glad for Facebook now as I can post a picture of said wildlife and other people who give a shit can Like it. I don't know why I find them so fascinating really, maybe it's just that it's a damn sight more fun than talking about the news these days 