I'm honestly a sucker for a good metro. I love the Paris one and the London Tube rocks. BART is great and so easy to use, but Boston's is so bloody simple a child could figure it out! LA's I've ridden plenty, but it's really slow, not frequent enough and about all I can say good for them is the orange line bus runs often and they're pretty clean and safe overall. Still, they did a good job for me - at least until they raised the prices to be prohibitive. /grumbles/

If I do wind up down under I'm sure I'll be looking up quite a few people! I miss traveling, but for now I'd be happy to just get my arse over to SF for a day in the city. (I've been craving Yerba Buena Gardens on a sunny day. /sigh/)