Joe, many of JB's covers are in the checklist area. However, not all of them have images. Here are my favorite. I think I've narrowed it down.

10.) Incredible Hulk # 314: I had never read many Hulk comics before this issue. (Maybe two or three max.) This cover has everything in it to make a first time reader excited to purchase that comic. Villians galore and a Hulk that looks amazing.

9.) Blood of the Demon # 13: This cover is a testament to how wonderful JB's art was for this series. The mood and tone of the storyline is already set by just this image.

8.) Wolverine # 17: At first look this cover is just a simple image of Wolverine lashing out. However, it is very important in the scheme of me collecting comics. I had quit reading comics in high school. But seeing this cover at a local flea market brought this hobby back into full swing. Plus it was the ultimate symbol that Byrne and Wolverine were back together! Very iconic.

7.) Avengers # 187: The entire team of Avengers at the mercy of the Witch on Wundagore Mountain. Who in their right mind wouldn't want to read that?

6.) Fantastic Four # 238: JB has a knack for also making some pretty humorous covers. Doctor Doom does not appear inside this comic is my favorite of that bunch.

5.) Superman # 9: Superman and Joker are one and the same? You had to pick this comic up to find out more.

4.) Captain America # 249: I loved the action, the various robots looking like other heroes/villians. Just a perfect cover for Cap.

3.) Next Men # 16: JB putting the Next Men in super-hero costumes. I loved the results. 

2.) Uncanny X-Men # 133: Not only is this issue the finest issue of JB's X-Men run, it is topped by one of the best covers of all time. Wolverine is completely bad-ass. I can't imagine any child skipping this issue if they saw it on a spinner rack.

1.) Daredevil # 200: This would make the top five of my all time favorite covers list. It is the purest way to judge a cover. I didn't collect Daredevil. But I bought this comic soley for the cover. DD looked battered yet still getting the upper hand on Bullseye. Who looks like he might never appear in a comic again. You had to find out what happened before this image occurs. I don't even recall the actual story inside. But that cover will stick in my head forever.

Joe, same here. A few of your choices almost made my list. I would be hard pressed to argue with any list.

If it doesn't have Dr. Doom, it can't be on the list. 

At all.

Its hard to pick a top 10, but my favorite Uncanny X-Men cover by JB is #136, with # 141 close behind.

Right....Top ten favourite Byrne covers.....not sure if I can list them in any order but here are my best ten....

Uncanny X-men #115....Sauron...nuff said!

Fantastic Four #259.....Doom and Tyros (Terrax)...if I ever got a commission it would probably be a re-imagining of this!

Fantastic Four #238.....Loved it, loved it!!!

Fantastic Four #242.....Again.....Terrax!

Fantastic Four #245...Sue Richards on her own against Franklin (?)!!

Fantastic Four #236.....soooo many characters!!!!

Iron Fist #8....(Romita hand aside of course!)

Blood of the Demon #1....nearly bid on this on ebay!!!! sooooo wish I had!!!!

Uncanny X-men #137 - iconic cover!!!!

Uncanny X-men #138.....awesome!!!! Couldnt wait to read this book....the sign of a cover doing its job!!!!

I'm not going to make a top 10 list since it would take too long to think about all the JB covers I remember and then I'd end up editing the thing 50 times as I remembered ones I forgot, but I'll say this much:

my favorite JB cover and perhaps my favorite cover of all time is JB's Superman # 1. It's perfect. Artistically it's a great piece of work and it shows enough of what the story is about to pull a potential reader in like a powerful magnet.