In honour of her birthday, I've been thinking about how Daisy's love life is written so well in Agents of SHIELD.
Romance is not really her main relationship focus (I think the main thing for her is her family), but she does have several romantic partners and I think they are all done so well.
She has quite a few romantic relationships, but this is never mocked or criticised, and is instead seen as a sign of her growing and changing.
Ward (and the guy from Rising Tide who's name I cannot remember) teach her to be careful who she trusts. She becomes involved with Ward very soon after becoming involved with SHIELD, and while she becomes super close with them, she does learn to become more cynical (there also could be foreshadowing here about her biological family in s2).
From Lincoln she learns the obvious about her powers, but she also (eventually) learns to not to blame herself for deaths that happen around her (especially after Trip and her mother), and to let other people help her.
Robbie is her mirror at her lowest and darkest point, but this also helps with her self-forgiveness, and she also helps him out of his dark place.
Daniel as a final love interest made a lot of sense because he represents everything she learnt: she is wary of him at first, but then comes to trust him entirely, she lets him help her when it is required (and also saves him a bunch of times), and she also helps him because he is a man out of time, whereas she (finally) feels confident in herself and where she fits in the universe.