Paul P,I could not disagree more. All the major drum VSTs behave exactly in the same way, all of them. You drag the MIDI-loops onto a MIDI-track and that's it, edit them or record your own. That's the industry standard, regarded best by most.
 
Also, practically all soft synths behave the same way: There's a virtual keyboard for testing the sounds, but none of them (?) allows you to record that keyboard. IMO, you're saying that the most unpractical, amateurish and clumsy method should be made a starting point. You can do that mouse clicking in the PRV in a controlled way with visual feedback of the results.
 
You can't even control velocity with a mouse (or are there velocity sensitive mice?). Have you ever tried to click a mouse to metronome beat? 16th note hihats? The mechanical structure of mice is not designed for such accuracy.
 
Have you ever tried recording drums with a MIDI-keyboard? You can record easily three (say, kick, snare, hihat) instruments simultaneously (more with practice) with a real swing and feel.
 
Of course you are fully entitled to your opinion, and that's 100% ok, but it seems to me you're favouring a poor method 'cause you're not familiar with the good one.