We have had our 5yo rescued Dane, Star, for a few months, so this is my warning for prospective owners.
Don't get a Dane if you don't like:
constant gentle attention-seeking
adorable dog faces encouraging you to stop whatever you're doing and play
large dogs leaning/sitting on you, just to try to get a little bit closer to you
licks on any exposed body part
drool (although Star really doesn't drool much)
dog hair (though less shedding than my Akita/chow mix)
My son (6 years old) says he doesn't like Star because... she licks him. However, Star loves my son because he leaves a food trail behind him. No wonder she tries to lick him!
Hope this helps!