It might seem a little strange for a Brit to want to cruise round their own country, but this was an extra cruise (not in the original brochure, went to places I love and the price was great.
Constellation is a really classy ship and it was easy to see why Celebrity have won so many awards for their Millennium class vessels. You don't get all the glitz and colour that RCL offer (previously cruised on Navigator), instead there is an understated air of refinement and quality, but not in any way stuffy.
This is an ideal size for a cruise ship. 90,000 tonnes buys you a vast range of amenities and dining options, but without feeling crowded or herded. There are very few lines to wait in and even tendered ports are stress free for getting on and off.