Very friendly atmosphere in the city, even at night, walking arround, wondering in the streets, looking at sights (good lightning). We went for a wine drinking with few locals to one of the squares, were invited by a man - nightguard of the summer cafe - to sit at "his" cafe, drink wine and chat. Especially helpful, if you speak Russian.

Everything... Kavkaz (Caucasus) mountains, churches, excellent food but you need a car for transport :/ 
And surprisingly quite good beer (Kilikia)

Ville très charmante et agréable à visiter. La Toulouse du Caucase (pour ses pierres rose), Erevan est ouverte aux influences étrangères (restaurants internationaux, terrasses en été). C'est le point de départ idéal pour toute excursion dans ce petit pays très riche en culture qu'est l'Arménie.

je souhaiterait absolument y retourner car comme pour gyumri je n´ai pas de souvenirs

In the Matenadaran Manuscript Museum worths to hear the guide he says soooooo many interesting stuff about them.

Food market, Yerevan: the best dried fruit I've ever eaten!