Using loop cuts to smooth out a mesh I was wondering if it is better or not to use loop cuts on a mesh when they are not really necessary to the shape of the mesh while using a subsurf modifier to make the spaces between each vertex approximately even, and to make the model smoother.

Here is an example: on this sword I'm modelling, there is quite a big gap on the blade without loop cuts because I don't need them for the shape of the blade.



Should I use those loop cuts to make the model cleaner or can I leave it as it is?

Thanks for your help!
Don't add polygons for the sake of having more polygons, you are looking for a special shape. So would do better having a really simple shape to start with, bevel the edges that you want to be sharp and then apply a subsurface modifier. Add loopcuts afterwards if you need more details.