Left to my own devices, I spend most of my time at Disneyland and really only head over to DCA for RSR and to eat (I would say that DCA has the edge at the moment in food quality; perhaps not decisively, but I've had much better luck trying new things on the DCA side of things than the DL side). Eating in SFS is pretty inevitable at some point or other during my trip, whether for entrees or for sundaes at Ghirardelli.
Invariably, other people like DCA much more than I do. I've been with a friend who was obsessed with Guardians and insisted we ride it all the time back in 2018, and I've come to the realization that my mother (my most frequent DLR companion) honestly prefers DCA as well. As much as she likes the DL stuff, the reality is that if she didn't know it existed as a child, she doesn't really care about it, and if left to her own devices she might honestly be fine demoing the rest of the park if she could be assured that the Matterhorn, Big Thunder, MMRR, Pooh, and the parade route stayed. She seems to have much more fun with RSR (really, everything in Cars Land, as she also loves Mater and Luigi), TSMM, Soarin', Incredicoaster, and Guardians than anything on the other side of the esplanade beyond the stuff I've already listed. Perhaps it's just the comparative novelty of the DCA stuff, as she's been riding some of the other things on and off since the 60's.
I imagine with a newbie I'd probably be closer to 50/50, but it's hard to know for sure since I haven't been with someone that's new to DLR in some time.
