There's a quote that sums up the answer to that perfectly, only I can't quite remember it, something along the line lines of "Jack of all trades, master of none"
If you are going to make money trading you need to have a system you understand and have faith in, and will stick too. In practice, for most of us at least, it means working out a system of our own that we feel we have ownership of. Other people's systems may be a good place to start, but I doubt anyone ever became a financially succesful trader stopping there.
Apart from anything else, if we all followed the same system it wouldn't work, as we'd all be trying to buy and sell at the same time.