The Straight Dope themes have mouse-over now. The other themes don’t. OTOH, Sam’s Theme has some good stuff on the Thread List page (like the OP’s name and latest poster’s name shown in plain-text and the time-stamps of those two posts) which the SD themes do not. Elsewhere, several posters have agreed that this is a persuasive argument for Sam’s Theme. But now with mouse-over only in the SD themes, we are conflicted as to which theme to use!
I’ve created a thread, One Theme To Rule Them All, where we can all discuss what we like and don’t like in the themes we’ve tried, and what we want to see in a theme. If we come to some general consensus on what a good theme should have, then maybe TPTB can pull all the best features together into one theme.