I, too, would like to travel transatlantic, and am thinking doing a spring and fall voyage (doing so can save on r/t airfare). I've been on three transatlantic cruises and love 'em! Like yourself, I prefer adventureering on my own two feet or using public transport (rather than ship's excursions). I'm easy going, courteous and respectful of personal time and space. Favored lines are Princess, Celebrity, MSC and Royal Carib and Holland-America.