Colan is known for his TOD run but I thought he might have been the definitive Iron man artist. Also, he was born to draw Batman. 

No question my favorite is his first Dr Strange run. Second is his long run on Daredevil. But of course, he was wonderful on everything.
Colan is definitely one of my top artists. Y His style was so unique, never copied.

I own the splash page of the first issue of Dr. Strange he drew. #172. Bought from Gentleman Gene himself.

I enjoyed his Night Force.

For me it's his swashbuckling Daredevil, though I quite liked his tenure on Captain America, from #116-137. Never really had a favorite inker on his work.

A favourite right from my earliest days as a Marvel comics reader in the 60s, starting with Doctor Strange #172, the comic Kirby101 posted above, which was only the second issue of that series I had read (the first being the precedinig #171). For me his best work includes both Dr. Strange runs, ToD, Howard the Duck, Nathaniel Dusk, Night Force, and Daredevil.

Best inker? Palmer is certainly up there but I think Steve Leialoha on Howard the Duck might be my pick - but only on that series: I recall an issue of Daredevil in the 70s in which Leialoha inked Colan and it was excellent but wouldn't rival the work Colan+Palmer in my eyes.

Janson I liked at first with Colan (some fill-in artwork in a 70s issue of DD) but later on, after Janson's style had changed, I thought they no longer made a good combination - I'm thinking in particular of their work on Howard the Duck after Janson replaced Leialoha as inker.

I agree that Frank Giacoia (in DD) and Bob Smith (in Night Force) are under-rated. Probably Syd Shores too, since that DD run doesn't see to get much attention. I would like to have seen Syd Shores ink his pencils in a supernatural or perhaps noir detective series of some kind as I thought his style with Colan's brought out the moodiness and dark atmosphere of those genres.

I think it might have been interesting if he'd done the Phantom Stranger when he wet to DC but of course Batman was and is a far more prestigious character. But maybe a miniseries or something might have been possible, with the right inker and writer. I wonder if the decision makers had decided that supernatural series were no longer popular by that time? Night Force was quite good but didn't last long.

Here's an interesting interview with Gene Colan, conducted less than two years before he sadly passed away. He's always come across as a gentleman from what I've read about him, and also quite a sensitive soul that wasn't always happy with how he was treated in comics. It's interesting reading how his working day was often 10am-2am, and he regrets not spending more time with his kids when they were growing up. Making a decent living from being a comic book artist certainly sounds like a heck of a hard slog.

In the interview he names Tom Palmer as his favourite inker. Funnily enough, in an interview with Palmer, he notes that Colan never told him his opinion of his inking, at least not for 30+ years, so he never really knew if he was happy with his inks or not! It's crazy to think that it was quite normal for inkers to go through most of their careers with pencillers not offering any opinion on their work!