I like it here, but do agree with several of the OP's points.
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Edit button for typos would be nice.
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It would be great to do polls.
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It would be nice to be able to quote people.
If I could just pick one, it would be an edit button. Even if it just allowed 5 minutes for you to do it (like digital spy does.)
No need for avatars really. And I like it that's it's easy to namechange, so people can't throw your posting history in your face.
And mixing the posts about to put the most 'popular' or 'liked' ones at the top, and create a conversation type thing, sounds terrible. No need to highlight any 'popular' posts either. Several forums I have been on have a 'like' button on peoples posts, and it's awful because it creates cliques, and people only liking posts of people they like/get on with.
There are some nasty catty vipers on here, just waiting to pounce, and have a go at ANYone, but there are lots of lovely people too. (More nice than not.) I have read some lovely replies on a couple of threads this past few days.
One where a woman got no acknowledgement of her 60th birthday from her family and friends, and one where a young mother with 2 small kiddies, had a horribly controlling husband who criticised everything she did, and she felt she enjoyed herself way more without him, and felt she needed to get out of the marriage...
There is some wonderful support on here, and lots of laughs... 
Threads about the same subject are annoying though. I have seen about half a dozen age-gap threads this past week alone!
I do find having to 'read the full thread' quite annoying, as I quite often can't be arsed to read 250-300 posts!!!
So quite often, when a thread is 10-12 pages in, I won't bother with it, as I can't be bothered to spend half an hour reading all the posts. Plus, by that point, what I would have posted/wanted to post has already been said! (Often many times!)