I used to always see my accept rate when I asked a question. Did this feature get removed or is it just not used when a certain reputation is reached?
The accept rate has been removed as of January 22, 2013. This was requested on Meta SO.
The community found it to negative, and it generated a lot of comments like "Perhaps you should first accept some answers", that got removed anyway because they were found to be inappropriate.
There are two problems with answers not getting accepted - a real one, and a petty one.
The real one is that the question doesn't look as if it has been resolved.
The petty one is that the author of a good answer doesn't pick up that 15 points. This prompts very low-rep users who really want those points to post comments soliciting an accept; for some that becomes a habitual badgering to have a low quality answer accepted just minutes after it was posted. But those with a few thousand rep probably aren't going to care that much - and if the answer is good, its upvotes will total more than the accept anyway.
All in all, it's easily possible that the pettiness aspect was more serious than the lack of "resolution".
It would be nice though if there were some way that questions without an accepted answer would keep popping back up to get their asker's attention. But some questions never get a good answer; so maybe there could be an "I saw it but it's not a solution" checkbox, so you'd only get a reminder about questions with answers which you had not "noticed" by either checking that box or commenting on.