I'm a professional python webapp guy and I like MongoDB better for the same reason. :) You might find tornado nice!
Some advice on turning this into a career: learning CSS and HTML is very useful, but there's (relatively) lots of jobs where you can program services for the backend and work with a frontend guy who's doing the design work and the user interface. Often for this sort of job though, the people hiring will ask you algorithm and data structure questions.
The other path you can take is really studying graphic design for a bit to train your artistic eye - if you can make pretty nice looking websites, and code up the backend to make them do interesting stuff, you're in a great position to go freelance / solo and build an app on the side.