Citywatch is right. Looks do matter. But that's not all that matters.
When I visited Taipei, I gave the town LOWER marks because it was so ugly. If it weren't for the ubiquitous colorful signage everywhere (like Tokyo), and the wonderful energy on the street with people walking around everywhere, I would have detested Taipei for its lack of architecture.
On the same page, LA is surprisingly much prettier than Taipei but would probably get lower marks as a city from tourists because of its lack of CONNECTIVITY (between all the "little pockets") and a MAIN AREA that is filled with energy like Union Square in SF. Downtown LA is the developing MAIN AREA and will prove every doubter wrong when it becomes a thriving urban center filled with everything a downtown should have: entertainment, living, work, culture, food, shopping, etc.
The paradigm is nothing new (citywatch). Cities with thriving downtowns just get higher marks no matter what. And with a Purple Line extended down Wilshire, "Downtown LA" is essentially EXTENDED as well and your urban playground becomes that much bigger and better. The subway will create the connectivity between the "little pockets" along Wilshire: LACMA/The Grove, Beverly Hills, Century City, Westwood Village, Brentwood, Santa Monica. These are the dots on a white piece of a paper that much be connected by a bold, purple line!
Even after just Downtown LA becomes a very fun place to go, people will already change their view of LA because there is a FOCAL POINT instead of just some ambiguous swath of land that is devoid of any strong character except strip malls and post-WWII tract homes. That is why everyone who loves LA is so happy to see Downtown LA finally becoming the downtown it should be...because it'll finally be something we can be proud of and that visitors and residents alike will enjoy and embrace.