None. Last April/May I already got two jabs and it's enough for me. Actually, I had opportunity to choose from these 4 vaccines and took Pfizer without thinking much. I just wanted to stay away from Astra Zeneca. Though, even without getting vaccinated, most likely that I would have light covid - I'm young and healthy person. In general, I got vaccinated just get covid passport.
But now, when omicron is spreading, vaccination is more or less pointless. For most people it have mild symptoms and vaccine don't give much protection from getting infected. Omicron is best vaccine now.
Unfortunately, I had no option to choose which vaccine I should take. The educational institution was opened in a hurry and the only condition was to be vaccinated. And the vaccine called AstraZeneca was being given at the health complex next to where I live. Since I didn't have much time, I took the AstraZeneca vaccine.
Even after getting the vaccine, I was exposed to a new wave called Omicron, Bad Luck! Not only me but almost everyone has been affected. I think one should be careful not to rely entirely on vaccines. Nose masks and hand sanitizers should be used. It will be possible to reduce this epidemic if everyone is alert from their respective places. But not to mention the vaccine, after the discovery and adoption of the vaccine, however, the Corona situation returned to normal.