An option to combine all threads from different boards in the thread watcher, with an additional field indicating which board each thread is from.
Rationale: I'd like to be able to jump to a thread I'm watching without having to click that board first. Additionally, I don't like having to click through each board to check whether or not I'm watching anything that I've forgotten about.
Feature request:
When the subject field is empty, the thread watcher ought to grab the first few dozen characters of the OP's poster instead.
Rationale: Hardly anybody uses the subject field, and having a dozen blank entries to click through kind of sucks.