I love WinSCP and I use only it for any FTP and SFTP connections. However there is one thing that I like more in another FTP client (FileZila), that does not exist in WinSCP - comparing and highlighting (by background color) files and folders by size and/or modification time. Newer files have green background whilst the smaller ones have red background (all others have white). It would be however more than nice to be able to manually choose default colors for larger/smaller, newer/older and non-existing files/folders for local and remote folders separatelly.
Of course I'm talking about the case when one is using the Commander view.