You can get dual fuel b/c electric ovens are superior in cooking than gas. You should get a convection oven which strips away the thin layer of air around meats and food making them cook better and faster.
Gas is cheaper but takes longer to boil water in comparison to the instant on electric burners nowadays.
Electric also offers smoothtop look and cleanability. Easy to wipe quickly and clean it.
It all depends on you. Electric is superior in most regards, people like gas b/c you can see the flame making it easier to adjust by eye. Electric nowadays is instant on in decent cooktops and several minutes faster than gas b/c of the surface area in boiling water.
You can get pro-series with like 15000 btu gas burner outputs for some serious stirfrying but hardly worth the cost.
Gas does not flavor the food so there is no reason to consider it from that perspective.
Easy to clean, faster, a bit more expensive but electric is the smarter choice unless you simply like the look of a gas cooktop.
I prefer a smoothcountertop with easy function.
You can get grills with downdraft hoods but those are a nightmare to clean and expensive to install a downdraft hood just to grill in your house, also you can get those in electric. Jennairs used to be the choice for downdrafts and you could replace the cooking modules.
Gas is just usually a cheaper way to go, cheaper product, cheaper energy costs unless you go with the dual-fuel ranges (gas cooktop, electric oven) which is much more expensive on average.
If you like to cook, make an island with a gas or electric cooktop with a downdraft hood(you'll need it for the island anyhow so might as get the grill). Then get a dual electric wall oven with convection. Kitchenaid, jennair etc...
Separate out the pieces, it adds value to the house.
You can match the pieces to your dishwasher and refrigerator so you should take that into consideration, but from a perspective of resale, people prefer the gas cooktop b/c it used to be superior and it still sticks in people's minds. Plus you can get high output burners and also sealed burners make it near as easy to clean
It all depends on your budget
A Jennair kitchen can be pretty sweet. Jennair is a line of Maytag only designed for upscale kitchens. Also Kitchenaid kitchens.
They are more economical or you could really go all out with a very expensive kitchen products but that really would mean a comittment in budget and need a consultation with someone to help design your kitchen so I wont mention those products.
I do like the refrigererator drawers my friend put in his kitchen. Small refrigerator drawer with veggies and another with meat under the cutting board portion of the island. Specialty build