The fact is that the numbers are so low that we don't know the predispose calculation for the vaccines reactions either. We're stuck ultimately with the gross stats.
For the adult population of Europe and the Americas any of the approved vaccines given today will give you better odds than waiting 6 months (or even six weeks) for a different one. Personally (though I'm sure
@Wibble would disagree) I'd be much more dubious about making that statement in Australia or New Zealand.
The UK has a case rate that's dropping along with the deaths. On a national level, we're getting a tantalising glimpse of what herd immunity might be able to do in terms of breaking infection chains.
So personally, I'd take the AZ just to avoid the feeling that I might pass it on to family/friends/co-workers/clients. But that's probably because I imagine I'm indestructible - that I won't get seriously ill with covid and that I'll be treated rapidly and effectively if I have a reaction to the vaccine. Hence why I'm taking part in a placebo blinded vaccine trial of an unapproved vaccine. I can't expect everyone else to read the numbers the same way though.