Having a circumcised penis will cause you to grow a slightly thicker layer of skin on your glans in order to cope with day-to-day irritation. This means that it will become less sensitive, and therefore that you will last longer with women. To that degree, I'm sure they would appreciate it. As for preferences regarding aesthetics, it very much depends, but I think that most women wouldn't mind either way - after all, both look the same once erect. In the UK it is much less usual than in, for example, the US, where most men are circumcised, so it's possible your partners won't have come across one before.