Dawnguard:
I'm still decided on which faction to chose on this DLC and I almost have made my mind up except for one more question. Are the Dawnguard Werewolves? I have not seen the answer for this anywhere. Knowing this will probably be able to make my decision.

Vampire Lord:
If I chose to become a vampire lord, will I still suffer the daytime and fire weaknesses if I have used the restoration glitch on my armor? As of now I have unlimited health, magicka and stamina.

The won't know you are a werewolf. only the vampires will know.
The dawngaurd themselves are not werewolves

If the dawnguard are not werewolves, then how do I become a werewolf again?

aela, will change you again

How do I get Aela to do that again?

go talk to her?....

^

Ask her. I believe she will only change you one more time if you get cured after that your done. And i hear there is a bug where she will not turn you if you are married to her

how do i engage women in conversation?

I didn't know you could ask her again, thanks! Now which class would you chose, VL or Werewolf? Which perk tree is better?

no, they're werebears

EDIT: just kidding

choosing to be a vampire takes your stats down by a certain percentage depending on your vampire stage when under sunlight. If you have immensely powerful armor boosts, it shouldn't affect you too much

If you are a mage be a Vampire Lord.

Yeah I'm a mage this time, thanks!

Try both! it depends on you really. which faction you side with does not affect whether you can be a VL or not (Tho the dawngaurd may force you to cure it you can always become one again)

Walk up to her. Mutter something incomprehensible. Turn red. Walk away.

[censored]es shall follow.

Get it? [censored]es? Because she's a female wolf-.... nevermind.

That's how I do it.