In my case, my choice came down to a similar tricky decision as the one I faced for cheetahs and Chester/Hamerton, with the choices being Howletts/Cotswold, and for very similar reasons; in point of fact, I did initially vote for Howletts.... as did a few other people, I think.
However, the factor that tipped my decision the other direction for this thread - as opposed to the direction I took for the cheetah discussion - is that the Cotswold exhibit for clouded leopard is attractive *and* has seen a fair bit of breeding success, whilst the Chester exhibit for cheetah has seen only patchy success with breeding despite being (in my opinion) the best looking exhibit for the species in the UK.
For what it is worth, I rather suspect that many of the people who voted for Cotswold in this discussion would have picked Howletts as a strong second choice, if we ran this thread again without Cotswold in contention. This is the problem with this particular means of voting, of course; it only shows the collections that people pick as their first choices. If we had a thread where people were able to assign multiple points to the entire field in whatever ratio they saw fit, rather that voting all-or-nothing, it is quite possible that collections which have reaped few to no points here would fare significantly better.