Things I would really like to see:
1) Voting - i.e. how many customers/users does this bug hurt?
2) Severity/priority/whatever - the distinction between these terms is subtle and normally (IMHO) insignificant, but you have to have some idea of how important the bug is. Most tools have this, but overcomplicate it.
3) Dependencies - both internal (on other bugs in the same system) and external (external libraries, software, etc). Most bugs have this in reality, but it's not normally expressible in the database, leading to long, pointless debates at triage time.
Things I think are largely pointless:
1) Any extensive questionnaires - any bug-tracker that asks too many questions will just get bad data. That's worse than none.
2) Controversial, but compulsory daily/weekly/whatever email notifications. They just get filed as spam/ignored/filtered out. If developers should be fixing bugs, and aren't, that's a management problem. Software cannot fix this.
