I have bought presets for roughly $500 since I've had my kemper.
Lessons learned:
-Profiles that sound great for recording and are pretty much mix ready are not great for live use (or at least in my case)
-Profiles that sound weird at home may be TITS for live use
-Do not use headphones through the kemper headphones out or even the soundcard because of flechter munson -> you want to know what it sounds like in the room at a reasonable level
-If it sounds great, it is great
-I use passive pickups and I dislike amp profiles that had been done on active pickups, they just sound off
Because I want my sound to be live ready for gigging and rehearsing I must say this - no matter what I tried my MBRITT Recto, friedman be50, 5150 and 5153 profiles with slight tweaks to definition have been delivering sounds that I have not even had back when I was playing live amps/heads/cabs. I'm not paid by MBRITT or any other folks but I am a HUGE fan of those profiles.
Another great pack for live is the GGD.
We're playing in fairly low tuning so slight modifications were necessary but nothing that would take more than 15 seconds

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These usually sound kinda meh at home for recording (except for GGD) but through a monitor on loud settings in a band I do not want to ever use anything else.
For home recording I always refer to my STL putney, sinmix profiles, or even those that are free on rig exchange.
All of these listed however sound a bit overhyped in gain/bass/lows there's lots of different mic positions which almost all sound like they are ready for double if not quad tracking. These sit really well in any quick mixes though.
(Almost as if you had a sound with a lot of 'information' captured but it would still sound narrow?)