I like Jira. The UX is good, allows for easy editing and customization. Then Jira Query Language enables good filtering and using it as a back end for custom front ends.
In my eyes it's like a phpMyAdmin specialized for ticketing with an interface which is good enough to not be annoyed when dealing with it.
Bugzilla is literally a cgi-bin Perl script where everything you do is a new page load.
Jira has tons of interactive responsive menus and time saving conveniences. Every month it gets faster and easier to use in some way. You can be way more productive and get work done faster.
Jira itself may be fine, but the people that run your company's instance are almost guaranteed to be certifiably insane. Other comments here spell out why. This is one area where its super-flexible design works against it.
>You can be way more productive and get work done faster
You get less work done because OCD admins keep adding more and more required fields to tickets and you end up having to spend more and more time on writing tickets. In a less flexible system you wouldn't need to deal with so many mandated stupid workflows that suck time away from actually writing and testing code.
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