AndiJF:
As you might have already guessed from my postings, I much prefer to keep very similar issues and topics within the same thread. See, for example,
Some recaps from Socal Secrets,
A couple of retitles, and
Clip art captioning. The alternative is to have numerous small threads, such as BobH's "quick recap #nn" in the "
Things That Should Have Been TG" forum.
When I first joined the forum, I tried to go back and read most of the old posts. I think that having larger, more organized threads would make it easier for newcomers to quickly become acquainted with the forums and with what has been discussed in the past. After having participated in the forums for awhile, I also think that having larger, more organized threads makes it easier to go back and find old posts that I want to refer to in a new post.
It's only when a thread has become very long (e.g. the three pages of "
School Daze Fan Art -- CBlack" and "
Fraylim's School Daze -- Then and Now (or at least Eventually)") that it becomes harder to follow an entire thread. Even then, however, I think that it's best to keep everything in a single thread.
As long as most posts stay reasonably short and the posts stay on topic, then having posts usually grouped into threads with informative titles that are based on related issues or topics is the best way to go IMHO.