Cross-Platform goodness. I am a noob here...learning how to implement Ionic is on the top of my ToDo's
FULL STACK ( preferred if;at all possible! ). Any "NEW" project (all me) I am tasked with I try to sketch it out with MEAN in mind first and then will tweak or stray from the 'plan' when necessary
WP-REST-API and whenever clients 'need' this CMS. Great community and okay docs, so I can't complain :)
Mailer, forms; anything that I feel PHP can still provide advantages simply AngularJS/MEAN stack