horizontal .vs. diagonal .vs. toeclips+straps

I have horizontals on my commuter bike; once you're in & going they're comfortable enough but there are some drawbacks:

• You have to adjust them every time you change trainers, which is annoying.
  
• If your trainers are quite rubbery they're hard to get into
  
• After riding clipless they feel horrendously slack.
  
  

It's getting to the point where I'm considering changing back to SPDs & just putting my work trainers in my bag.