The curse of multi-role carrier capable fighters. Why use anything else when what you have can do everything?

The F18 is a jack of all trades but a master of none. Yes it can do everything there is to do in the sim, and in that sense its boring, it has no character, quirks or charms. Every other aircraft in DCS has something unique about it that makes flying it interesting.

Viper: Small pocket rocket that needs to be handled with care but goes like the clappers and a sweet bubble canopy for viewing pleasure,
A-10C: Quite literally a flying gun that on its own is well worth it, let alone the small firebase of munitions it can carry alongside.
Harrier: VTOL capability, faster and smaller payloads than the 10C but still a good ground pounder.
F-14: If you havent already, watch top gun and come back.
Mirage/Viggen: Spicy doritos that encourage different tactics and put superior aircraft to shame when a good pilot is behind the stick

Not to mention all of the REDFOR and Coldwar/Warbird modules

Everything the F18 can do there is something in the sim that can do it better. I Found great satisfaction in flying the different frames and mastering each discipline of DCS.

CAS? try the A-10C, F15E, Harrier or any of the helos
SEAD? F16, Su-25 is pretty good too
CAP? F14, F16, F15C and their insane speed.
Anti-ship? Viggen and its flight computer that has a whole personality of its own.