Bear in mind that Jira is hugely customizable. So, saying "I use Jira" is more like saying "I drive a Ford" than like saying "I drive a Mustang."
Your experience will depend on the plugins you've installed, how you've configured custom fields and workflows, your org's SSO policies, the hardware you're deploying it to and how well you keep it up to date (if you're deploying on-prem), etc.