Ability for multiple torrents to share the same directory.
Ability to remember window details (size and position, main and sub panel)
Both work for me already.
Categories are powerful but complicated in Tixati, I tested them some time ago. For example the Priority column always displays only the individual torrent setting, but the category setting works too and it doesn't just take precedence over individual setting. For example there are three torrents:
a) normal priority, normal category priority => Normal displayed in priority column, behaves like Normal
b) normal priority, above normal category priority => Normal displayed in priority column, behaves like Above Normal
c) above normal priority, above normal category priority => Above Normal displayed in priority column, behaves like High
Both individual and category priority are active, you can have torrents with different priority in the same category, nice :)
Add inactivity metric to transfers.
Great idea!