Gas or electric oven with gas stove
I have used gas ovens with gas hobs, electric ovens with electric hobs, and electric ovens with gas hobs. By far the best combination is gas hob and electric oven. I'll break the pros and cons down:

Gas Hob

Pros:


Heats up quickly
Heat changes quickly - when you turn it off, it's off.
Fine control over heat


Cons:


Can create 'hotspots', but this is why you have different sized rings
Can be fussier to clean
Obvious danger of gas leaks, but modern safety systems mitigate this


Electric hobs are pretty much the opposite. They can be slow to heat and react slowly to heat changes (so if you want to go from a boil to a simmer you have to plan 20 minutes ahead). They also have the disadvantage of remaining hot even when they're turned off, which can be dangerous. Their only advantage over gas hobs is a more even heat across the pan, and being easier to clean.

Electric Oven (preferably fan)

Pros:


Quick to preheat
Even temperature throughout the oven
Precise temperature control


Cons:


None that I can think of


In contrast, gas ovens are slow to preheat, have marked zones of different heat (cooler at the bottom, hot at the top) and have coarser heat control. Also, because the flame is generally at the back of the oven, you can end up burning larger dishes that butt right up to it. All this builds up to make an unreliable oven (in terms of cooking results).

In conclusion, a gas hob/electric oven combo is the best because it gives you ultimate control over your cooking.