I order the same dish at every family restaurant meal. Do I owe everyone a more adventurous choice?

I was halfway through ordering grilled chicken when my brother interrupted: "We came all this way and you're having that again?" He'd chosen a restaurant with dishes he was excited to try.

I told the waiter I'd stick with my order. Later my brother said I made the evening feel wasted, as if his choice of restaurant hadn't been worth the trip. I'd enjoyed being with everyone; I just wanted a meal I knew I'd like.

I don't have an allergy I'm asking the restaurant to accommodate, and I'm not looking for a diagnosis of my food preferences. There are unfamiliar dishes I'm curious about, but choosing an entire main feels different from trying a small amount.

Is offering to share a starter a reasonable middle ground, or does that still turn my plate into a family project? I want my brother to feel his choice mattered without promising to enjoy whatever he puts in front of me.