Ive been using Illustrator for several weeks now and it's not that bad of a program if you ask me. From what ive personally gathered, Illustrator is more of a program to create layouts, assets, and logos. Although can see it being a massive pain in the ass when trying to do line work or coloring for things like sketches, character design, or creating compositions, it looks like it can come in handy for web development and graphic design.
One of my main nit-picks is that you have to get use to letting the program do 70% of the work for you, leaving you feeling like a un-accomplished pile of dick at the end of the day. Along with the fact it has tools put there for very VERY specific tasks, so you have to know exactly what you are doing step by step while illustrating something, or else you will find yourself fighting a line turned to clusterfuck of paths for 6 hours.
All in all, its a professional program made for creating loss-less buttons and logos so your boss can print it out and wipe his ass with it at an un-tampered resolution because YAY SCALING! You can also use it for creating rad t-shirt logos and get that cashmoney$$$.
It's cool, but for now im still sticking to MS Paint.