Couldn't both cases simply be due to past experiences?

Yes several times a month

If you go back far enough, your decision was likely influenced somewhere by marketing.  Think about it: if you played the game at a friends house, but remembered the brand name of the console or the name of the game, well that is marketing.

If your parents took you before you had any concept of what a video game was and showed you two consoles, you would likely pick based upon which box design/art you liked.  That's marketing.

In modern society it really is everywhere.

marketing makes me aware of a product but i only get it once i have reserached what it is. When it comes to food and drink if it looks gd i want it

I bought the Conduit because the Wii sackfans told me to. Does that count?

No, it's really not. Unless my fried was employed by the company to create publicity for their products, then it's not marketing. Traditional marketing means companies taking action to create publicity for their products and make people want to buy them. You're stretching the definition of marketing/advertising way too much.

Believe me when I say I never pull the education card as I know how easy it is to claim, "I have PHD!" on the internet (I don't), but in this case I do have some education behind me when I say, that Brand development is ABSOLUTELY marketing.  Companies spend millions of dollars in developing Brand name recognition.

Additionally, "word of mouth" advertising is the best kind of advertising for a company, because it's free.  For example if I am not employed by Sony, but I spend a ton of time trying to convince you to buy a Sony product (just because I like them); I am absolutely marketing for them.  The definition of marketing does NOT include a "must be paid for" stipulation.

Now if you are saying, you lived in a world where you never heard of videogames before (via commercials, word of mouth, etc) and just happened by a friends house who didn't tell you how good a game was, just let you play it without saying a word, and you tried to remember the name of the game itself (becuase you've never heard of them before...) then yes, you are correct, you are free of marketing's touch!

Marketing is effective at getting me to think about things but not buy then :P If i see a advert fro a TV. computer / film or a game bla bal bla i always search it up first and see what other people have thought of it xD if its got bad reviews i often don't uy them. The only exception to this are traditional jrpg's since they almost always get strung by reviewers but i like them :3

You're right though about "word of the mouth" being actually considered advetising, though in my honest opinion I think that that should not be the case in every situation (mainly situations in which companies do not put a conscious effort into generating "word of the mouth").