I do, although I'm still new to operational level strategy games.
Right now I've been playing a lot of Conquest of the Aegean, which is a company level operational level game (you can control up to multiple corps though). Unlike most, it's real time, though it's not even remotely "click festy", since you're moving around hundreds of men so stuff happen slowly.
It has easily the best AI I've seen in a wargame, both for your opponents and for you subordinates (you can issue orders to commanders at various levels to avoid micro and be confident that they will be able to handle it most of the time). The AI opponent frequently will try to flank you, and send recce units deep into your rear to cut off your supply lines+harass base/artillery units. It's very much a challenge.
It also has significant order delay, which means you can pull off feints etc to great effect since any enemy response will be sluggish if you've managed to draw his attention elsewhere. Reserves also are paramount in a way I haven't seen in other wargames.
I highly recommend it. If you're interested in the series you might want to get the newer "Command Ops: Battles from the Bulge" though. It has an updated engine and further improved AI.
Other than that I play Combat Mission a lot, though the AI isn't really up to snuff there so its more a purely vs human affair.
Post edited December 18, 2012 by NoxNoctum