Is there a reason for almost every British tank having a "C" name ?
Challenger, Chieftain, Cromwell, Churchill, Centurion....etc

Maybe it's just random, I don't know,

It's a relic of the days when tanks were divided into Infantry (slow, heavily armoured, reasonably well-armed) and Cruiser (fast, lightly armoured, not so well-armed). The Infantry tanks had random names but the Cruisers quickly ended up with C names. The more useful tanks towards the end of the war were developed from the Cruiser line - Cromwell, Comet, Centurion - so the habit appears to have stuck. The Churchill was an Infantry tank but the reason for that particular name is fairly obvious ...

I think I kind of like the fact that all American tanks are named after Generals...Sherman, Sheridan, Stuart, Patton, Pershing, Abrams

Steve...I'm sure you're aware that the nameing of American tanks after American Generals was started by...the Brits

Remember reading about somewhere.it nearly caused an international incident when the British called one of their new lend/lease tanks...... Lee !!!! (A SOUTHERN Civil War General )

I know the m-3 light tank was called both the Honey and the Stuart. Did the Brits name thins one after JEB stuart (Reb cavalry General) or did we fall into the pattern? Thge other version of the Lee was the Grant, same question

Yes, the British named the M3 Light the Stuart, after CSA General JEB Stuart.
Then they named the M3 Medium the Lee, after CSA General Robert E. Lee.
Of course, this was only 75 years after England backed the South in the American Civil War! Apparently the Brits were okay with that!
Then they named the next two Grant and Sherman, to even it out. Obviously someone figured out that naming all of the free tanks sent by Washington (not Richmond) after Confederate Generals might be a diplomatic blunder.
Tank type names were never used in any official US Government nomenclature or documentation during WWII. They were a British moniker, but all troops picked up the names since they were easier and more specific than the dozens of completely different items that might have the same US standardization number ( M3 light tank, M3 medium tank, M3 grease gun, etc...).

Oh, and the Brits called the M3 Light Tank a "Honey" of a tank because it was fast and reliable, two traits that somewhat eluded British tanks of the time.

Some British authors have suggested the name was accidentally coined by US training personnel who showed the British forces in North Africa how to operate the M3, since calling a responsive vehicle "a honey" was more characteristic of US slang than British at the time. Of course, it's impossible to be certain at this late date.

Thanks for the help and also for a little history lesson