My favorite chisels are 19th century cast steel that I got for next to nothing on eBay or on one of my antique mall visits. I also have lots of Pfeil because they were the easiest to get when i needed something. As the others said, experience has shown it is best to buy a tool when you need it. Otherwise, you end up with lots of stuff you really don't use. The following are what I keep on my bench and use regularly:
Favorites *
Bench: 1/8″, 1/4″*, 1/2″* , 3/4″, 1″, 1 1/4″*
Morticing: 1/8″*, 3/32″ (antique tools - I have never see modern ones this size)
Stamping: 3/32″* (ground from music wire)
European No.(sweep/width mm) Gouges: 1S/5*, 2/16, 3/16*, 7/6*, 8/3*, 8/4*, 9/2*, 9/5*, 9/7*, 12/1*, 12/3, 21/6*
The no 8s are ground with round noses for chip carving.
I only recently starting using the no 12 "V" parting tools having been told by all my teachers not to use them. However, I was never able to cut narrow incised lines to my satisfaction with a skew. I can do it with the "V" parting tools. However, the "V" tools from Pfiel must be reground to a much narrower profile in order to cut lines that look like metal engraving.
As to the no 2 to 9 sweep gouges, you may find other sweeps and sizes more useful. It is a personal thing. You used to be able to try out chisels at WoodCraft, I don't know if you still can or not. I suspect it is a store by store thing.