Wardrobe - Best hinge option?

I think, for surface-mounted doors (they go over the edge of the unit sides?) I'd use this type: http://www.screwfix.com/p/easy-mount-hinges-90-105mm-pack-of-2/38662

Doesn't require a hole-saw like wot kitchen cupboard doors do.

But you'd likely need 4 per door if your doors are heavy. They don't all need to have springs - these can be removed.

Anyways, that style.

Ordinary 'butt' hinges won't work as you will be going into the end 'grain' of the MDF sides - not good. So I suggest you need hinges that will fit to the smooth sides of the MDF.

 

Paulo, standard euro-hinges for frameless units. Any kitchen supplier/fitter will have them on stock. I would personally go for 3 per door. You'll need a forstner bit to make the flat bottomed hole in the door to accept the hinge. The doors will be self closing. You can adjust for squareness on the hinge.
Good luck.