i'm such a novice and not worthy to reply in a tips thread so feel free to plonk me

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for the ks patterns i trace just inside the lines with a permanent marker on a heavy duty clear shower curtain. when i cut the pattern out of the shower curtain it leaves me going through the lines to cut. i like the way this works because it leaves me with a "window" to float around on different fabrics to get a feel for what the end result will look like. it is quite handy for placing prints just right as well. the pattern i end up with is just slightly inside the real pattern. because of this i cut outside the pattern, not on it, using the clear pieces as guides instead of exact patterns.
i don't like the rotary cutter for the following reasons:
a) i tend to end up for pulling the fabric.
b) while the rotary cutter is faster it is also less forgiving.
c) the scissors are slower which allows me to make whatever modifications i want to make as i am cutting.
d) i like the feel of the scissors and the sound they make as they go through the layers.
i do like the rotary cutter for cutting straight lines. i don't use a ruler, i look at the line at the end and aim for it. this gives me the straightest lines but it may not give you your straightest lines. i think a lot depends on how each person processes visual information.
cutting is absolutely my favorite part.
take all of this with a half a grain of salt as i am an absolute novice.