Is there anything more maddening than hearing a person being interviewed start every sentence with the words 'you know'?
I pay attention to that sort of thing. It seems that "you know" is a specific phrase that people use to cut themselves off when they've lost the thread of what they were trying to say, and start off with a new sentence, on firmer ground. There are other interjections of that nature that are signals of insecurity amid a hostile or socially or organizationally superior audience. People who are confident and just can't think as fast as they talk are often the ones who just say "uhhhhhh."
Saul Bellow, one of the most articulate American writers and a Nobel laureate, was just dreadful to listen to in a live lecture. He was so careful about phrasing his sentences perfectly that he had to stop and think after every third word, and just stood there at the lectern going "uhhhhhhh."
I HATE how people use "LIKE" the correct term is "for example" abrivated to "eg"
I thought for a minute you were referring to the 1970s American interjection. "I'm, like, coming down the stairs, and my mom, like, sees me and she goes (another annoying Valley Girl expression) 'Why aren't you in school?' and I'm, like, 'Mom, there's a big sale at the mall today,' and then we, like, have this big fight, and my dad, like, walks in..."
"Like," used the way you describe, is perfectly acceptable in informal speech. No one says "for example" unless they're giving a presentation. And only a pompous academic would actually say "e.g." in speech.
However, we have lost track of the proper usage of "like" versus "as." In the 1950s there was a huge cigarette advertising campaign, "Winston tastes good, like a cigarette should." A few people reminded us that it's supposed to be "as a cigarette should." Those of us who were educated in the old days can usually decide intuitively which word is appropriate, but even I would have to look it up Strunk & White before I could explain it to you in terms of grammatical rules.