My motto (most of the time), is "What's the worst that can happen?"
I try lots of different techniques and have lots of strings to show for them because if they don't turn out, I just cut them into strings and put them in my string drawer to be incorporated into my always-on-going string quilt.
I'm a visual learner...Written patterns confound me so I rarely buy a pattern that doesn't come with videos.
So, to actually answer the question...I'm not afraid to fail nor am I afraid to try...except needle turn applique. I have never tried it and I just can't get myself to even attempt it because I think it would drive me crazy and who needs the aggravation?
Watson