Of course previous experience will affect current opinions. If you walk up to a man and he gives you a dollar you'll like him. You do the same thing for years with the same or similar results everytime and you're really going to like this man a lot. Then lets say 9 years from your first encounter the dude kicks you in the nuts. You're gonna be pissed for a while for sure and the next time you see him you'll be cautious maybe even scared. You muster up the courage to up to him anyways and he gives you another dollar. Sure you may still be mad about the nut shot but a bucks a buck so you keep going back. Ever since the nut shot he's gone back to giving you a buck so you start to relax and enjoy him again, BUT you'll never forget that time he kicked you in the nuts.
I hope I don't need to explain my analogy.
You can have opinions based on single issues but previous experience will affect it. This isn't a good/bad thing it's just how the human mind works.