Most of the visitors for Tenerife holidays head to resort towns located around Playa de las Americas like Costa Adeje and Los Cristianos. Unless you are visiting Tenerife for beach holidays only, I would recommend getting a bit further from the crowds instead.
From what I saw, the popular destinations feel like they were built for people seeking package holidays getaway. It was done so in the most uninteresting part of Tenerife Island. All the cool stuff is somewhere else.
If you want to get intimate with the natural beauty of the island, Los Gigantes or La Laguna are the better choices. If you don’t like calm places, Santa Cruz de Tenerife or Puerto de Santiago are the places to go.