A lot of writers will not read in their own genre when they are writing, in case they absorb too much and it gets into what they are doing. I don't avoid my own genre, then worry about it, which is fairly typical for me. At the moment I'm doing OK, as writing in two styles has given me some leeway. Reading masters in your own genre can, of course, make you green with envy and totally despairing of ever being that good. It can also be an inspiration.
I've been thinking of a few of my romantic suspense/thriller favourites, and what I get from them - apart from an exceptional reading experience, that is. Something to learn. With all of them the suspense is a given, cracking fast moving plot, plenty of action, romance - not always front and centre, but always there.
To take four of them:
Greg Hurwitz - I am totally hooked on the Orphan X series. A little heavy on the boys' toys, but hey - if I ever have to equip my own personal SWAT team, I shall know exactly what to ask for. From his writing? Wheels within wheels. The story looks as if it's about to wrap up, but you know it can't because you are only a quarter in, and he just keeps doing that.
Harlen Coben - secondary characters. His protagonists are often surrounded by real or found family,
Jayne Ann Krentz - how to handle the spooky stuff, as her books often have a paranormal or supernatural edge, but it's all knitted into real life - contemporary, historical or futuristic.
Karen Rose - incredible - and very hot - love stories, as an integral part of the fabric.
There are more, but those will do for now. You can read for pleasure, but you can always read also to learn from masters at their art.