I came to WP from Movable Type in 2007. I loved that WP was installed in five minutes out of the box instead of what was needed to install Movable Type.

I also liked WP use of PHP instead of Perl because my server host at the time really clamped down on Perl use so much so that my MT pages took a long time to generate and sometimes I would get one or more 500 server errors.

Coming from MT - WP wasn't that hard to use.