When we did our side/rear extension, we installed a full sized oven, a steam oven, combi-microwave (ie oven and microwave) and a warming drawer. Granted we used the main oven and microwave the most, but the steam oven and warming drawer came in handy at Christmas time (and to keep the take away warm the rest of the year
). We sourced ours from the Miele Outlet centre in Abingdon and on eBay (main oven (exdisplay)/warming drawer/steam oven) so they were all top quality and it is well worth it imo.
Our fridge freezer (relatively 'standard' size) was integrated so it was 'hidden' away, you can do the same with american fridge/freezers too i believe or just buy one tall fridge and one tall freezer side by side. If they're integrated noone can tell.
We got a kitchen tap that also did boiling water so that you didn't need a kettle cluttering up the worksurface.
Quartz worktops (i prefer a lighter colour, we now have black granite and it is a nightmare to keep clean - both water marks and dust!). Wood requires maintenance and can get damaged by hot pans and marble needs sealing if i'm not mistaken.
Induction hobs do come down to user preference as pp said, although we now have gas and i miss our old induction. The advantage was that you didn't really lose any worktop space, was unobtrusive and it was SO much easier to clean than gas hobs with burners. Just make sure you get a wide one, i think ours had six areas that could be turned on individually or in pairs to make a longer heating space. The disadvantage of course is that you cant just heat up any old dish on there.
Agree with underfloor heating and lighting - especially under the eye level cupboards to give some ambient lighting in the evening.