If I am doing small scale detailed quilting, I like an open toe foot, like this one:
http://www.bernina.com/en-US/Product...oidery-foot-en
If I am doing large scale all over patterns, I like a closed toe foot like this one:
http://www.bernina.com/en-US/Product...arning-foot-en
The reason for the difference? In small quilting I need the visibility the little foot provides. In large quilting, I often catch my thread on the prong- and that ruins everything!