Currently I am using Band-in-a-Box (BIAB) to listen to my initial musical ideas in different styles to figure out which way I should go ie which style matches best.
To do that, I import the the MIDI part into BIAB and apply to it different styles. When I like something, I then import it back to Cubase and then create a groove presets from it for later use.
If Cubase had the infrastructure to easily import and manage hundreds and thousands of styles = groove presets = groove quantization maps and to search for them like searching for loops and presets in the Media browser, then I wouldn’t need to use BIAB.
There are many resources to be tapped. Presets of arranger keyboards, real-time arrangers like Roland RA-90, styles created for programs like BIAB and there are even quantization packs for Cubase.
etc. etc.
There are countless style libraries on the net.
And to take the idea even further, Cubase could also implement a possibility to batch-analyse files (MIDI and/or audio) in Media Bay to extract from them quantization maps and to automatically tag them with information like genre, duration, time signature, with/without swing etc.