Idle or New field or Column Required in Interaction Records

Dear Team,

Could you please help me in suggesting a fieldor column which can be used from existing OOB for capturing some broad level of ticket categories.

The field or column type will carry typical text only and we have fixed type of data available to be captured, i.e. we are looking for a dropdown type of field.

we have to ensure its available while customizing the views and also available in text file while exporting the records.

Thanks and Regards
Hemant Vaswani