1. I'm very fond of him. Now bear in mind I started with TNG, so this means I feel about him primarily in a TNG context, though after an initial "what the hell?" I eventually got around to accepting him on DS9.

2. He was the first Trek character (after Spock, admittedly, but Spock leaving Vulcan for Starfleet was a big deal of who he was) whom we saw bringing his own cultural context with him which sometimes superceded the Starfleet one. Later day watchers will never be able to emotionally get how revolutionary it was when Worf killed Duras instead of listening to Picard, or that we saw Worf talk about Klingon mythology and try to practice Klingon customs as best was possible on the Enterprise, or the Klingon political storylines. This just had never happened before. (Spock returned to Vulcan during the show precisely once. There were no storylines on Vulcan.). I'd go as far as say that DS9, the Bajorans and the Cardassians would not have been possible in Trek if TNG hadn't gone there first with Worf and all things Klingon and if the viewers hadn't reacted positively to it. This larger historical context aside, I like that Worf, for all that he's having a hangup about being more Klingon than Klingon because he was raised by humans and thus misses the party going most other Klingons seems to indulge in, actually has a dead pan sense of humor if you pay attention. Favourite example, from when Q is temporarily human and everyone thinks he's faking it due to earlier mindgames:

Q: I'm really human! What do I have to do to convince you people?
Worf: Die.

3. On the humorous side, when Q has transported them to Sherwood Forest: "Captain, I am NOT a Merry Man!" (It's Michael Dorn's delivers that sells the line.) On the serious side, in First Contact, when Picard, at this point losing it due to Borg trauma, tells Worf he's being a coward. Worf's reaction, the dignity, quiet steel and awareness how ooc it is for Picard to behave this way is such a great character moment, and ditto for the way he responds to Picard's apology many scenes later.

4. He scored with three of my favourite women in Trekdom - K'eyhlar, Deanna Troi and Jadzia Dax - so his love life wouldn't be bad to have. :)

5. No.

6. My first moment of "aw, Worf" came in "Heart of Glory", TNG's season 2, when he brought the renegade Klingons down but performed the death cry for them nonetheless. I definitely loved him when he went through the ostracism by the Klingon Council, hugged and turned his brother around so his brother, who lived in the Klingon world, would not share his banishment. (The DS9 episode Sons of Mogh is such a stupid follow up on this with the mind wipe, I can't tell you.)

7. I don't have one, but in terms of Worf's canonical romances, I loved the one with K'eyhlar, was never quite sold on the one with Deanna, and liked the one with Jadzia from the moment they had their "But you are not in my shoes!" "Pity. You'd be surprised what I can do in a pair of eight inch boots" exchange.