Problem with Illustrator is that it never was, and still is NOT A GOOD PROGRAM. As long as it exists, it was merely sold because it was almost free with the purchase of Photoshop. Take the 5 different pointer tools for example. Horrible. Until the latest 5.5, masking had been totally cumbersome. Selecting of masked items: hell.
Its competitor, Aldus Freehand, and later Macromedia Freehand, was much more how a Vector program should work. The 10 year old Freehand 10 version for example, is still capable of most stuff InDesign and Illustrator 5.5 offer together today! At just 38 megabytes for the whole program folder, 9 Mb just the app alone! Grab it of TPB and give it a shot. It will FLY on your 2010 PC. We can almost consider it abandonware today, you can't buy it new, so promoting downloading does not feel wrong in this case..
I only use Illustrator for 1 thing: it has excellent EPS, PDF and DWG conversion.
For really serious vectorizing, Freehand has a big edge: it allows very precise adjustment of grips, and you can change from pointy angle, to line-to-curve, and to spline corner with a very easy information tab. Also is it the only program that has round corners on rectangles that stay round with resizing.