canonkid47

As a primary i would rather get something like the canon fd 35mm. Or 20mm canon fd.

Yes what camera are you using? I'm assuming a crop sensor Canon.

I used a 50mm for about a year as my primary lens, and used it for about 90% of the stuff I shot until I could afford more! Not ideal for everything, but a great way to learn and build up your skills

To an extent, yes each lens will have its own look. That being said, I don't think it will look "different" in the way you are imagining. Professionals use all manner of different lenses. You should have no problem matching footage from the Canon and Rokinon. Definitely no need to stick with one brand.