We have a large island 3m x 1.5m in our new kitchen with sink and hob - no other workspace in the kitchen area.
I didnt want the popup power socket thing and with nowhere else to put a kettle we have a 3in1 boiling tap from Abode (much cheaper than the Quooker ones) they also do similar normal taps so i was able to choose a matching tap for the utility sink.
I have lots of drawers on one side of the island and bar stools on the opposite - not much space under the sink as the boiling tap bits and bobs are there as well as an insinktorator waste disposal.
I keep handwash and dishwashing liquid in nice glass dispensers that can go under the sink but picked nice ones i dont mind leaving out.
Our bin cupboard isn't on the island but behind in our big cupboards and that is my only regret as it would have been closer on the island i guess - but i do have a full size wine fridge and dishwasher instead....
We have all other small appliances in our big cupboards - toaster rarely used and microwave sits on a shelf, we just keep the door open when using for 2 mins. Cake mixer or smoothie maker i bring over to the island and use a socket hidden under the bench.
My main advice would be boiling tap and waste disposal - relatively cheap and has been brilliant. We have Silstone worktop with integrated seamless sink, so easy to keep clean!