Here's a few clips from the vengence quest.  The first is the death of the mob who was the cause of the great evil in the sewers.  Too bad mob deaths in EQ deaths all this cool:

Okay, and here's a picture of when I go to the mother and tell her of the vengence I've wreaked in her name...I think she's happy about it:

With the expansion, ever class has gained 1 item, which is unique to it's class only.  Paladins got some shields, druids and barbarians got helms, and assasins got claws.  There's a lot of different types of claw weapons, but they're all claw class.  An assasin can use any type of weapon, but I recomend claws because not only are they the only type that's going to give you + assasin skills, but there's a few martial arts and shadow skills which require claw classed weapons.  Here's one claw I picked up during this act.  It's fine steel (everquest refrence....basically it's a good weapon, but not really compared to my current weapon) compared to what Sintil's wielding now, but that prevent monster heal is a damned cool effect:

Set items are the big thing in Diablo 2.  You want uber?  You want high resists with high stats and skills plus good armor class?  You want a full set of something.  1 piece of set armor may not be great, but as you pick up and wield multiple pieces of that set, the other pieces gain in stats.  Higher ac, resistances, stat bonuses, skill bonuses.  It's pretty cool.  This is one of my favorite set pieces.  I currently have 3 pieces to this set:

Okay, so as I said, at the end of Act II, you kill this demon thingy and free the Arch Angel Tyrael.  Here he is:

So I'm all excited.  I freed him.  W00T.  Maybe he'll give me some uber new thing..or more stats..or maybe a new skill ability to train in.  No..no instead he's disapointed in me!  Bleh..does no one respect me: