I am happy with a seal in a wine bottle that provides consistency, and does not interfere with the way a wine should taste.

Cork does not provide consistency and has problems from taint (TCA) and oxidation present in entirely unacceptable percentages. Diam is OK, plastic corks are not. Crown seal is preferred for sparkling wines.

Screwcap is proven to be far superior to cork. There is proof that wines age consistently, and I have only ever had one “leaker” under screwcap despite some dinged capsules.

Statistics of problems with cork that I have monitored for the past few years (of my own wines I have opened)

2018 (to end June) 9.62%, wines with issues (the hall of shame)
2001 Tyrrells V1 Semillon
2006 Fevre Chablis les clos
2008 Brocard Chablis les clos
2001 Pipers Brook Riesling
NV Tim Adams Tawny (Port), an older bottling, these are now under screwcap

2017 4.7%

2016 5.5%

2015  7.4%

2014 7.6%

2013 8.6%

2012 5.7%

2011 8.9%

2010 6.4%