Thanks for the tip about deleting my posts in that thread. Could be a ball ache, but I think there's one or two threads where I've only got one or two posts in there anyway. And I'm really tired of seeing that thread bump.
Also, thanks for the pointer about the watchlist. I guess I haven't really explored everything the forum software has to offer.
Well , if you feel that having unwatch would remove "Show New Replies" feedback would be better , you could suggest it on the Meta section to discuss the new forum software.
Honestly, I never check those sections as I lurk on the forums a lot. I check Off-topic , Services , Economics and Meta around 12-14 hours a day.
If any post of mine gets bumped, I notice it as soon as that happens
The watchlist seems like the best place, as you would be able to opt-in selectively instead of having to opt-out every time.