Second Life is scary for so many reasons. First off, your avatar can fly! I typically hate things that fly including, but not limited to, birds - especially geese and swans, mosquitoes, and bees. Secondly, the learning curve sounds horrendous, although I'm assured it is not as difficult as I have convinced myself. My time is precious and I have become accustomed to a "right now" way of life, not a "two hours from now" way of life. Thirdly, this is yet another thing that will keep me (and presumably others) from having human face-to-face contact, something that my social-butterfly-nature holds dearly. Last but not least, it costs money. I'm used to having everything on the internet be free.
However, despite my rants above, second life possesses a wonderous world of educational opportunity including live classrooms where you can learn second languages to classrooms offering role playing learning opportunities. I would like to learn more about second life and play in this virtual world, hopefully learning new things in the process.