I love the atmosphere in Overlord (and the music for once), but it was a little too much of drama for the sake of drama to my taste. The setting was still interesting though, and quite grim yeah.
None of my play-throughs of ME or ME2 ever involved any romance, at all. I've not even bothered to roll a maleShep for the sake of romancing a woman none ever see, and I like said woman very, very much.
I have never played a maleShep just for the sake of virtually getting laid with a NPC...
And neither have I. However the fact that Tali is one of the romance options for maleShep was to me, a bit weird and a bit tempting at the same time - Think about it - Quarians can't even spend time with each other without suits because their immune systems can barely handle it when they are synchronized together in a contained environment, so how the hell do they practically romance anyone else?
While I'm not sure on the details atm (don't recall all of it anymore, been a while since I played ME/ME2) it's an interesting question. And Tali is a bad-ass character that puts Krogan to shame - Charging into battle with a shotgun when suit-rupture is more hazardous to you than most other factors? Bad-ass, and a bit suicidal.
So because I like her character, rolling a maleShep to see how the romance option goes is always mildly tempting, also due the fact any romancing adds more variables to the 'what did you do and how did it turn out' part of the game. It hasn't happened yet for a variety of reasons, one of them being, that I agree on Lallara's opinion.
[romance spoilers following]
[spoiler]
Tali is the best romance available imo. Close one with Jack though. Yes, I may be a bit fucked up (especially regarding Jack), but they are actually the deepest ones you can find : Miranda is just a big-boobs fan-service bitch that ends up screwed in the elevator from what I have seen, no clue at all how you can romance Samara, Morinth is just lolcrazy hedonistic (and lolethal)... As for femShep, Jacob is Miranda's mirror testosterone absurd sex occasion on the boat (oooh look at my V shaped chest and all my muscles zomg), Garrus is just a one-night try (he admits that he is not particularily attracted to humans), though I have no clue at all how it is for Thane (might be good actually, but probably very awkward...). As for ME1, it was a little better, though that was not awesome either. A bit dull/cliché, but fun and in the B-series spirit of the game.
So yes, Tali, even if they spend their time speaking about how its dangerous and all for quarians to have flesh relations (even with their own species) and how to deal with it, and Jack because it is actually her fucked up mind that is interesting to soften in that romance. She ends up crying in the love scene at the end, which you may not be expecting as a player.
[/spoiler]