"Differential Equations: A Dynamical Systems Approach" by Hubbard and West (parts 1 and 2) are very pleasant reads for people with a fairly pure bent.

My initial exposure to differential equations was from an instructor that had taught so many service courses he appeared to be incapable of giving a conceptual overview of any subject. So my opinion of differential equations hit an early artificial low point. But Hubbard's books are very cheery in comparison.

Smale and Hirsch's "Differential Equations, Dynamical Systems and Linear Algebra" is quite a pleasant read. More dry than Hubbard and West, but that's not always bad.

I might have some other suggestions later...

I've often wondered if there were any good textbook accounts of the local-Lie-groupoid-of-symmetries approach to differential equations.