Painted stripes- Everything has to go just right with the fine-line tape and removal so you don't get bleed-through under the tape or something go wrong on removal..

Decals- Wide decals going over body contours can be a pain to get flat and get all air bubbles out..

Myself- 3 year old Pheonix-Graphics decals that still look just like they did the day I put them on, when I messed one of them up going on they sent me another one of that piece dirt cheap