IMHO , Square bottles are more ergonomic , I always disliked them. Photography is about continious tones generally and square does not feel good. I loved big round bottles , I dont like square glass bottles also. Ilford bottles looks like milk or juice bottles and they are good for stacking in markets or safer transportation but these two dont interest me.
Straight cut film with rectangular shaped negatives must get you down. Stay away from 6x6 format, the square is particularly tone disrupting. :-)