M48 Patton.

Oh totally understand - the M48 is a very strong vehicle, especially now that they've updated her model and given some slight, but needed buffs.  Very stronk tenk.  And when you can get hull down and get that gun singing on the 7/1, you can really carry.  That's another one I don't play nearly enough!

LOLz, the CAX was my first tier 10, well the 4202 was, but literally finished that grind first on purpose because I wanted the CAX.  Finished it the night before I left for Brazil for business, because the switch was happening that week when I knew I'd be gone.

I haven't played the CAX in awhile, but I think it might still be my most played tier x.  Or is it the 268?  I'll have to look.  I don't hang out much at x.  

Regarding the Sheridan grind, keep in mind that I have always been a person who likes fast and mobile tanks - I prefer lights and mediums first, and while I will play some TDs and heavies, my preference leans towards mobility and faster ROF.  So for me, the Sheridan grind was easy.  By the time the tier x lights dropped, I already had way more XP than I needed on the T49 and RU251 to get the Sheridan and Panzerwagen, and only a little bit to grind for the 100LT.  Some will disagree, but I run the 90 on the T49 and find SIGNIFICANTLY more success with it.  You don't get the LOL factor of derping the crap out of someone, but I really moved my MOE up quickly and end up contributing much, much more to the matches with the 90. Been running it exclusively for well over a year and a half now.  

I did the Sheridan "grind" so long ago, and that was before they moved things around with the introduction of 10s, that I can't really talk intelligently about it anymore.  However, for context, I still run the M41 Bulldog on occasion (and the Brazil and the M41 90 German Bulldog), and if I didn't have the Lycan I'd still have the T71 in my garage.  I also have both tier 6 American lights in my garage, as I like them both.  Neither have more than 3 skills right now, but that's because I've moved my better crews up the food chain.  

I don't currently have a crew in the 100LT, as I have way too many russian tanks I like to play, and not enough good crews to go around.  Since I don't end up playing a lot of 10s, I chose to drop that crew back to the 54 lightweight, as that is one of my favorites, for sure.  The LTTB is one of my all-time favorite lights, although I haven't played it too much lately as I've been running other things.  

I absolutely love tier 8-9 light tank game play.  If I was forced to choose one focus area to play for the rest of my tanking days, it would be tier 8-9 lights (even expand it to tier 10, honestly).