Visiting Ankara - Questions

Merhaba arkadaşlar :)

I'm planning a ~3-4 day trip to Ankara this April and have a few questions:

• Is Ulus a good neighborhood to stay in? Or is it better to stay in another neighborhood and use the metro to visit the museums in Ulus?
• What is an "Aspava" restaurant? Do they serve doner?
• What are the hipster neighborhood(s)?
• What are your favorite places/cafes? :)
• Any local Ankara dishes I should try? (Beypazarı Baklavası or Etli ekmek?)

~

Also, these are some places on my “to visit” list - please let me know your thoughts/suggestions/edits/etc (I like museums a lot lol) :
Anıtkabir 
Ankara Castle
Anatolian Civilizations Museum
Museum of the Republic
Ethnography Museum
Museum of Painting and Sculpture
Roman Bath Ruins 
Rahmi M. Koç Museum? 
Samanpazarı neighborhood
İşbank Museum 
Ulucanlar Prison Museum
Erimtan Archaeology and Arts Museum 
Cermodern

Restaurants & Cafes:
Meşhur Kebapçı Cahit Usta

Thank you in advance!! :)