My approach is to try and make it fit in with Black Mesa, but I'm not going to skimp on detailing and making things look good. Basic architecture is acceptable for this challenge, and I may end up with a lot of that, but that's really not what I intend to build these days.
I'm not entering this challenge to go for the prizes, it's a great chance to get back into mapping and work simultaneously with the community on a project together. I'm in this to build and release a map that I'm proud of and that hopefully people will enjoy playing.