Shared from years of cooking together:
The bottleneck for us is not the stove, but the sink, you have to use it much more frequently.
Therefore, regardless of everything else, always plan the sink so that it can be accessed easily from at least two sides.
Then consider how often and how long you stand at the stove. Personally, I stand there relatively little. Many things simmer on their own and I only taste occasionally.
Steaks are grilled on our gas grill on the terrace; in terms of smell, the best solution.
If a steam cooker (or combination cooker) is planned in addition, even less is done at the stove (and I wouldn’t plan a kitchen without such a device anymore).
Otherwise, I need work surfaces, that’s where I spend the most time.
So I would prioritize the work surface as number 1: as large as possible continuous surface, preferably on the island.
Priority 2 is an easily accessible sink. You have to go there repeatedly, for example to quickly wash your hands.
A strategically placed dishwasher automatically encourages you not to leave utensils lying around somewhere but to put them directly into the dishwasher (and thus avoid creating a battlefield in the kitchen).
And then the stove. A stove on the island is nice; you often see it with TV chefs, so everyone wants it. But we don’t have a camera watching us cook. Therefore, in my opinion, the cooktop doesn’t have to be on the island. It also depends on how big the island is.
Personally, I would find work surface on the island more important and a sink in front of the cooktop because I use the sink much more often.
In my kitchen, the cooktop is still on the island, combined with a small sink. The main sink is on the kitchen counter at the wall, which is parallel to the island. I thought long about whether to put the cooktop on the counter and create a very large work surface on the island.
Ultimately, the cooktop ended up on the island, but the reason was simply that I have the countertop running into the window on the kitchen counter—the window starts at counter height along the entire length of the kitchen counter—and I didn’t want a cooktop in front of a window where I would have to clean it every time I sizzle something.
Since both the kitchen counter and the island are each 3.30 m long, I still have enough space to work; the cooktop is also not centered on the island but placed to one side so that over half of the island remains a continuous work surface. With a smaller island and the possibility not to have the cooktop directly in front of a window, I personally would not have put the cooktop on the island.
A (small) sink on the island, however, I consider absolutely ergonomic.
I would observe myself carefully while cooking over the next few days and then consider what I use most, why, and then decide what to plan where.