One thing I've struggled with is re-creating a certain tone that I created on my Pod XT and that is an ultra-compressed, ultra responsive but relatively clean, lead tone that I had. Think Yngwie first album. I did a lot of experimenting with this tone on the Pod XT and while it's limited in it's use cases, I've had a lot of enjoyment and success in using this tone, mainly shred solos that don't require tonnes of gain/distortion.