I've been Linux only since about 2003. Started way back on Mandrake 7.x ... around mid to late kernel 2.4. Progressed through Fedora and then finally landed on Gentoo, where I will be staying for a long time unless other distros miraculously come up with a software manager as powerful as portage.
If it can be done in Windows, it can be done in Linux*.
* Does not apply to some Lexmark printers, some ATI graphics cards, and some Direct X games.