Obviously the no1 place for atv aerial.
If the aerial cant live on a chimney or there isnt one which is often the case these days then the aerail must be fastened to a good strong wall and not to near the top of the apex where the brickwork is farly weak.
How much gutter overhang is there?you can get round this in two ways,the best way to minimize visual impact is by using a cranked mast so the actuall bracket can be as small and inconspicuous as possible.
Large brackets that sit a stright mast offt the wall do look unsightly.
Always make sure all bracketry is galvanized not just painted,painted brackets quickly rust and become a real eyesore.