I had it a lot before and tried to convince myself I liked it - but I think the addition of the fungus makes it a lot less enjoyable than yogurt (just bacteria)
Sounds more like you were making a smoothie Kefir is distinct Yogurt is fermented milk with lactobacillus (bacteria) Kefir is fermented milk with bacteria AND fungi The big difference is the fungus and that's why it's sour, tastes a bit more "rotten" and remains liquid