I have read all the Thieves World books, but I have not read The Black Company Series.   I thought about running a BoL campaign set in Sanctuary, even started to stat some of the main characters but didn't get too far into it.

So I guess my vote would be for Thieves World.

 

I haven't read the Black Company yet but I do intend to soon.

I have been running some Thieves World sessions on-and-off using the d20 Crimson Blades rules that Simon wrote and we have had a blast. I was specifically using the original Chaosium boxed set with a slightly updated map I adapted from the later sourcebooks. I can't begin to explain how much fun and just how liberating it is to use purely random encounters in a game that I did no prep for.

I guess that is a very long-winded way of me saying use Thieves World - but don't overthink it.

Either or, both are awesome, I lean towards the Black Company myself.

Gruntfuttock wrote:

So, you end up needing more than one city, in my experience.

I just use the Cities supplement from Chaosium. It's much the same as the Thieves' World box set, but more generic. I use a random city map generator and this supplement, and Bob's your uncle, and Fanny's your aunt.