My favorites are the dies that cut angles accurately for me (and nub the corners to make matching easier). That means I really appreciate the tumbler dies and the triangle dies. Just ordered their new large flying geese die:
http://www.accuquilt.com/go-flying-g...-finished.html
because this is the exact finished size I need for a modern quilt I want to make:
http://www.fonsandporter.com/article...ng_geese_quilt
(in Quilty magazine Nov/Dec 2014)
I also have dies for shapes I know would be hard for me to cut, such as circles, and for specific patterns that have matching angles where a die makes the cutting easier -- e.g., hunter's star.
I'm one who does not like the strip dies. I find it is actually faster and easier for me to cut strips using the June Tailor Shape Cut Plus mat and a Slidelock ruler to keep the mat and fabric from slipping (and keep my fingers protected). I should sell all of my strip dies and mats, as I really don't like them.
The advice to buy dies for a specific quilt is a good one. That way you won't over-buy dies that you may never use.
I checked Overstock.com and their prices are better than Accuquilt's, but they don't carry all the dies. I'm wondering if Overstock may simply have a large stack of dies purchased before Accuquilt changed their policy on pricing (which cut out all discounters and made Accuquilt the primary source for die acquisition). Overstock may not be able to keep that pricing for long.