In pre-KnittingHelp.com days....I only had one project on the needles at any given time!
However, after coming here and getting inspired to try THIS! and THAT!....I find myself with 3-4 WIPS at any given time.
Not usually more than 2 sweaters, but add to that....maybe a baby project, maybe a shawl project, maybe a kitchen project. They might all have entirely different mindsets!
YES, I have started a project...only to FROG IT and cut my losses due to a loss of interest in it! Or, maybe I just don't like the yarn I used. I can see it's gonna be an UGH, or the yarn is a devil to work with for the project.
I bought a great yarn for a great sweater...and then thought "What am I doing??? I've got a sweater in this same exact color and style!" Meh. FROG POND! I still haven't knit that yarn yet...but when I do...the sweater will be an entirely different style.