when I started saying the things I was holding back on, my readings got a lot more accurate! that is different though to just saying what comes to you, I once had a very mean reading from someone and I mean mean! I always try to do my reading sensitively but if something comes to me or something weird or anything like that, I include it! I like to think that AT gave me confidence to do that and the worst that can happen is you are wrong or on the wrong track! but more times than not, people say how did you know that?
I do this in a careful way though, for example I was doing a tarot reading for someone and I got a sense of a court case. It just came to me but it was not in any of the tarot cards but it was related to work. so I said, this came to me and about the court case but I might be completely wrong on this, etc. There was an employment tribunal in the past. I try not to give those insights as definites but it's totally part of the learning process of becoming a great reader I think
Like Barleywine said, be cautious! but add it in! you will be surprised how you get many random things right