ditto the 45 is my go-to!
When I bought my first in the early 90s, I had Fiskars recommended as it had an easy grip and was more ergonomical.
I've tired using others, and have always gone back to the F just for the reasons it was recommended back then.
Interesting enough, I noticed recently that F still sells the same one ... guess you can't fix, what is already great!!!
I do not have the 60. Thanks for the suggestion as to when to use it.
I do have two smaller ones (different sizes) than the 45 ... both are good when doing micro fine cutting.
I also prefer these smaller oneswhen cutting around small plastic templates.
I have both the scallop and wavy blades. Have used them seldom, only for decorative edges.
When I bought fabric at a new-to-me LQS last fall, I noted they were using the pinking blade and commented. She told me the pre-wash tactic was the reason.