During an upgrade (to v7.4.4), we figured it very confusing when we comes to select the upgrade option. Usually  [ number ] would come before the text in my country. Hence, we almost hit 2 thinking it would be the option for upgrade.

Express Install (use default settings) [1], Custom Install (recommended for advanced users) [2], Upgrade an existing JIRA installation [3, Enter]

The bottom line is at least we could separate each option with a line break, so that it is easier to tell which number goes for which option.