Please realise support of win-key for hotkeys. I used before password manager and it supported winkey. Win+A - very cose to use for autologin. Just two fingers!
For me hard to use three keys in one time like CTRL+ALT+A. But CTRL+A or ALT+A etc - busy by system commands.
I will very grateful for this option.
KeePass doesn't allow the Win key as modifier, because according to Microsoft (http://msdn.microsoft.com/en-us/library/ms646309.aspx) the Win key modifier is reserved for the operating system.
But other managers support it. Just provide to user decision want he use "reserved" (win+a - not doing anything) hotkey. It's more comfortable than three keys. Did you think about non-usual people?