(edit)...I have never used either Corel or Adobe so i don't really know the difference. I will be interested in the future in doing custom designs, shading, transparencies, etc. Do you guys know the difference between Corel and Adobe & which one do you prefer?
I use both everyday. It just depends on which hammer I need, as to my preference day to day.
I adore the elegance of Illustrator. It's simple to me and I prefer it for design and illustration. ...and all the tools work.
Corel is more function oriented for me and I prefer it for diagramming and composite layouts - specifically the measuring tools and multiple pages. Some of the tools can end up with goofy results, though.
It's interesting to me seeing the different layouts created by individual artists using each tool. With intermediate/advanced users of each, I can typically tell the difference between the use of the two applications because of the way the layout has evolved and the tools used.
Because you mention designing,
shading, and transparencies, I'd suggest leaning towards Illustrator. To me, it's got a stronger set of these types of tools. ...and the terminology and effects of the tools are based on traditional process camera work.
Though, you can create similar effects in Corel, they appear to me to be just that, effects. They seem to be based on computer coincidences rather than mechanical techniques of yore. I'm a traditionalist snob that way. To pick one, I prefer Illustrator for it's kinship to industry heritage as well as it's ability to make pretty pictures. ...probably the reason it is
the industry standard of graphic design. ...but hey, get and learn both.
Is the newer versions of Illustrator more user friendly than v.10??
no...