I talk to a LOT of beginners. And some of them have trouble grasping some basic keeper concepts, even with corns. Although a few bright, "animal whisperer" type people seem to have a way with all kinds of animals, and are able to take on more difficult species totally unfamiliar with them, I would always advise beginners to start with easier, more manageable species. Why set them up for less likelihood of success if they are more likely to succeed, and stay in the hobby, with something more appropriate for their experience and skill level? I would never say that NO beginner could ever start successfully with anacondas, or even a rattlesnake. Each person is different. But unless it is a very unusual circumstance, I would very likely advise them to start with the closest type of snake or lizard to what they THINK they want, but which I think they will likely be happier with. For example, start with a boa if you like giant snakes, an Amazon tree boa if you like emerald tree boas, or a corn if you like more difficult colubrids such as Mandarins. Of course, they are free to ignore my recommendations, and many do, lol!
Unless they have done a TON of research, I think that after interviewing the novice, I will probably be in a better position to evaluate their likelihood of success and happiness with an unfamiliar species of reptile than they themselves will be. However, I should point out that I DO try to keep my own personal likes and dislikes out of the equation, and try to evaluate with facts and honesty. If I mention my own preferences, I try to let it be known as just my own opinion. After all, they do eventually have to make their own choice, and live with the consequences they decide upon.