That would be the major problem with graphic sets. For the most part, I'd suggest ironhand for beginners. But I must say, that if they need a graphics pack to get into DF they're likely to quit sooner or later. I love the asc II but it just hurts my eyes to much, which is why I use ironhand.
I would disagree, but it depends on your definition of "sooner or later". I haven't played Super Punchout or Xaxxon in a long time, either.
I required the Graphics pack because I refuse to try to translate a bunch of random colors and symbols on the screen into something my brain won't twitch sideways at. I'm a few years in now. ASCII sucks (opinion). If it's what you're used to from when the game was a few bare bones and you've built up with it, or if you invested the time it takes to grok the meaning of all that random crap, awesome for you. I and those similar to me need the graphics, even though we think the game is awesome.
However, on topic: I introduced recently a friend of mine to DF, after BS'ing with another person at work about it in front of him. We were discussing the circus I'd accidentally freed in a particular fort and the ensuing catastrophe that followed. While discussing breaching the magma sea to slow them down, and then pouring the cavern lake into the stairwell behind it to seal it and only losing four miners, he got curious as to just what the hell we were talking about.
Roll forward a month later, and a similar response to the above comment: "Dude, I work on bikes, date, go for rides, workout, eat dinner, and sleep. My other option is DF. I'm afraid DF got trumped. I fell asleep."