Yea I quit playing MP before platinum released. Think I did one match just to see it on my engineer and blasted shit to bits cuz carnifex is still win.
As for DA:O and Divinity, I don't really know how uh, I guess, convince you, or not. Divinity/Baldur's etc are really just my cup of tea; I played them when I was very young - IE Khorum said his nephew couldn't stand it when he was younger but liked it a lot now that he's older.
It PROBABLY has a lot to do with what you expect of a game and what you grew up with. I grew up with my uncles who played video games, read comic books, D&D and whatnot, so when we started doing SC, BG, Icewind Dale etc, it just fit for me. I knew it, I could understand it, and it was fantastic storytelling. Admittedly, I think that style of storytelling it sort of...different than most people expect, especially say, someone who started with something like Halo. (Granted I liken Halo to Quake MP back in the day but I digress.)
With the addition of some real time mechanics, you can probably get a lot more people into these games.
They're all worth playing if you want to see a story play out with nods to choices you yourself made. DA:O is fantastic if you liked Baldur's Gate; it's not the same but you can see the nods it gives to it. The way the music starts/stops, the sound the items make in your inventory etc. All the same.
DA2 is...well I still liked DA2, but as I've said in the past, since RPGs are sort of my thing, I have played some fantastically shitty ones, and still probably come out with at least a SINGLE thing I liked. DA2 is still worth playing if you liked the world and whatnot; there were things that got better, like interaction between your companions (They had lives outside of you) and the way people reacted while you did things, instead of just in conversations.
DA2 starts with a bang and DA:O is a bit of the old school start, where you are running around a very peaceful type setting till disaster strikes. Someone told me the other day they hated how slow the new RPGs started versus the old ones and I was like, are you for fucking real. Planescape: Torment is like a solid hour + getting shit in the mortuary, ToEE and PoR are like, fuck I just remember trying to run up to people forever until i found the right person, or the right start. BG1, and NWN2 both start out with you in your home village and you do random shit until something happens, though NWN1 I think starts out with someone attacking I think? Yea, mostly slow starts really.
Anyways, I guess what I am saying is, they're worth playing if for nothing else than good, old fashioned, awesome DMing really. If you expect to crash bandicoot mobs you'll be sorely disappointed.