Most of the ME romances are fine - it's not the case with most DA games, where there has been at least one romance which has been more heartbreaking/awful than anyone else's that you might want to avoid (Morrigan, Anders, and Solas respectively). There is one romance that is feelsier/sadder than the rest, but you're aware from the beginning that it will possibly end badly.
I think they're all pretty good but I will put in a good word for Garrus, who is my favourite 
Agreed with Cee: don't romance Jacob though.
Before sleep..
I'm trying to decide on drawing: Isabela, Merrill or Abelas.
Honestly the thought of drawing Abelas excites me. Greatly.
I vote Merrill! Dalish cinnamon roll please.