Within Ticket Lists you can manipulate column Sets to show more or less data in the rows.
Using the Cog button you can then export as a TSV file which includes to data, columns & rows you have selected.

Within Asset and Client Lists it is different, although again you can alter the column sets you are offered different options to export the data.

It would be good if:
1) Excel Format was added to Ticket Exports
2) Client and Asset Exports followed the select columns within the row.