Jadzia Dax is probably the most beautiful Starfleet crew member among all the Star Trek series. While this may be subjective, it is a fact that she had lots of suitors.
Jadzia Dax was initially pursued by Dr. Julian Bashir aboard the station. The Ferengi bar owner, Quark, also has a special affection for the Trill scientist, even after the Dax symbiont was transferred to Ezri. However, her most notable and serious suitors include
Deral, played by Brett Cullen, a prominent member of the recurring planet Meridian ("Meridian")
Dr. Lenara Kahn, played by Susanna Thompson, a Trill theoretical quantum physicist and the current host of the symbiont Kahn, who was previously joined to Nilani, the widow of Torias Dax ("Rejoined")
Lt. Commander Worf, a Klingon. Dax and Worf connected over their mutual love of Klingon traditions, including Klingon Opera and martial arts. Their intimate relationship began in "Looking for par'Mach in All the Wrong Places," and in "You Are Cordially Invited..." they were married and Jadzia Dax formally joined the House of Martok. Their attempts at parenthood (despite the difficulties faced by biological incompatibilities between Klingons and Trills) were cut short when Jadzia Dax was murdered.
Captain Boday. An unseen former lover of Jadzia's who is occasionally referenced. Boday is a Gallamite and like all Gallamites has a transparent skull. Worf becomes angry with Ezri when he learns she had lunch with Boday.
Worf was an alien and that is a big natural barrier to marriage due to so many cultural and physical differences. This is why there are very few human-alien couples in Star Trek.
Why did she marry Worf out of so many qualified suitors to choose from? What are the factors behind Worf's victory over the rest?