Bella doesnt really care whether you are chick/neutral/dik. There is some minor 'chick' bonuses however.
Be warned though, Bella and Jill are very good friends. Jill pretty much demands chick and if you are on both paths in the same file there will be hell to pay and you have to be chick for that to be possible.
Personally i love soulcrushing Jill so i say go for chick and pick Bella when the time comes
It warmed my heart immensely.
Dik/neutral is generally the better game experience imo. I dont give a shit about Jill in comparison to the rest of the cast. All the most interesting story content can be gotten to via neutral/dik with Bella, Maya and Quinn.
Then again, I fully expect being neutral is a bad choice and final outcome in the game by the end (my preference sadly) instead of min-maxing which is overwhelmingly the best choice in all games across the board by a long shot. For completion its easiest (and most likely best?) to do full on dik or chick as in Sage/Quinn(othes) diks vs MJ/Bella/Jill chicks.
But "everyone" is doing that to easily maximise content in as few paths/saves as possible and where is the fun in going the beaten path everyone else is doing?