Ok so for one thing this LI, main girl, side girl thing is getting a bit jumbled and mixed up. There are definitely things that distinguish each group, but it doesn't and shouldn't affect a players love and enjoyment of them. So I'm going to break this down by common things I've seen of each group in BaDIK specifically.
Now is any of this gospel?
NO way. These are simply traits that distinguish the categories of these girls
SO FAR, but that being said these traits have been common among each group in the episodes we've played. Are there exceptions in each group? A
bsolutely, but majority of each of those traits listed apply to girls listed under them. Yes there's differences between each groups label/title, it does not change that the player can enjoy any of these women. In the end what's going to affect anyone's enjoyment or relationship with any of these women is first and foremost personal taste, secondly will come down to DPC giving each enough screen time and interaction, and a possible ending (not sure the MC is going to be able to run off with Jade or Cathy but who knows; we'll see
Never say never).