I definitely agree with what @jack07 has to say, but just remember that “low poly” doesn’t have a strict vert count, so whilst I’d definitely recommend getting rid of non-silhouette defining verts – especially if later down the line you decide to convert this into a game asset – it’s not the biggest issue if you don’t. As long as you’re not using a subsurf modifier (though of course feel free to use the others) you’re all set!
