? you get to be a badass vampire lord with some unique powers and abilities, My favorite is probably Vampric Grip
? Dawnguard get some good stuff, Such as the crossbows and other great vampire tools
? Some Evil Shouts, We get a more darker approach with the Dragonborn and their shouts like Soul Tear( Wickly Evil shout)
? An actual Enemy I like some so cool that I couldn't help but want to be, because he was awesome and felt like a real Lord to vampires he was a very good addition to the vampires in the TES all together
? Arvak, This undead horse of burning sorrow was perfect for us wanting something unique and evil looking as a mount, He's cool and I don't have to waste my precious gold buying another [censored] horse since they like attack randomly...
? Crossbows, Now Bethesda you gave us a cool weapon that we wanted to see for like ever since Morrowind and you gave it to us, The new bolts are cool and the Dwarvan Crossbow is now in my Proudspire Manor...
? Some clever Design in the Expansion that other game company's will probably try to copy, such as adding more feature, rather then just weapons, armor, eta...
-Stuff I didn't like-
? lack of artifact weapons, Auriel's bow was cool though so were those Dwarvan artifacts you have a choice to get either one
? Random vampire town visits, It was cool the first time but now it just gets too repetitive.
?Lack of Spells, We didn't get any Distruction spells, So my Mage is going to hate it.
? Lack Serena Marriage
Great Add On though 8.7/10 for being pretty much bugless and making Skyrim a bit more Darker then it was previously... No one get hurt this is my personal opinion and share yours as well.. I can't wait for Add on two