Some of the similarities are independent, confident career women, not plot-heavy or too extreme scheming characters, but rather depicting a more recognisable character gallery and situations that seem more plausible.
Both stories also contains something around how events during childhood can effect a person.

Both of these dramas fall into the group of "growing up, slice-of-life, love and friendship".
It's a while since I watched When I fly ..., but I remember it left me with a strong impression, as did You are Desire.

The main similarities between these two are career women meeting younger men, and the challenges the "opposite age gap" leads to.
Where "Encounter" has a bit more plots to it, Sunshine by my side is more "slice of life", I would say.

Booth series contains action and fight scenes, friendship and struggles, but the main reason I believe you might enjoy Bloodhounds if you liked D.P., is because they both contains some underlying more serious topics as well.

If you got totally charmed by the sweet emotions in Amidst a Snowstorm of Love, you will likely enjoy Road Home as well.
My impression (from my memory of these two series), is that the lead couple in Road Home is a bit older than the lead couple in Amidst.
Both of the series touches upon adapting and evolving when finding love.

If you like dramas with strong, independent female characters, like the female protagonist in Will Love in Spring, then you might also enjoy Rising with the wind.

Both of the dramas touch upon encountering love and facing big decisions, although in different ways.

I feel these two dramas kind of have a similar vibe to them, even if the storylines are a bit different. They have strong female characters, and good character developments.
Both of them touch upon obstacles in life, and delicately handles some societal norms and issues.