Romulan BX was a big surprise as a very balanced strain. In short: Strong aroma, good colas and nice resin production.
Nepal Jam is a resin producer with brutal growth and short flowering (a bit longer than Romulan). You can also hunt good production easily as it only has 1 phenotype and the stems are very big. In short: Explosive growth and resin.
Gorilla Zkittlez is my selected phenotype and only feminized strain I still maintain together with the Blue Zushi. It has a good grow with a nice structure that opens it's arms to find better lighting and reaching amazing yields, it has decent resin production and the aroma is strong with a big Zkittlez predominance. The backside of this strain is that requires around 3 weeks for pre flowering and becomes long time waiting with a lot of stretching. In short: Strong aroma and spicy flavour, very stretching and productive with long flowering, requires short veg or it will overflow your grow space.
Apex is a strain I got from a friend he selected from Ethos but I don't find anything special.