I love my Olfa ergonomic 45 cutter. I have small hands and this size works best for me. I also like that the blade automatically retracts once I let go of the handle. I'm always forgetting to push the blade guard after I cut on the other ones. I have a smaller blade that I use when using some templates.
Thanks for the tip on the pinking blade potentially damaging the cutting mat. Great idea however in pinking the edges when you pre-wash for less ravels.