[Arneldo]

From the OS;

1. Rodrigo - 89% - Present
2. Charlie - 79% - Present
= Siavash - 79% - Present
4. Dogface - 76% - Present
5. Halfwit - 74% - Present
6. Karly - 66% - Present
7. Noirin - 60% - Present
8. Cairon - 55% - Evicted
9. Saffia - 49% - Walked
10. Angel - 42% - Evicted
11. Kris - 39% - Evicted
12. Beinazir - 32% - Evicted
13. Sophia - 23% - Evicted
14. Markus - 22% - Present
15. Lisa - 21% - Present
16. Sree - 13% - Evicted

Going by this, Rodrigo is the most popular housemate on the OS by quite a margin.