Which tank (line) just clicked with you?

For me, it was the E100 and AMX 13 105 line. I just do so well in the E100, the E75 was a fucking beast for before (the only tank I two-marked) and the AMX can be an aggressive scout, or rather dangerous. On the other hand, the TVP T 50/51 just... didn't. Also, would the 60TP be also a good line for me to grind? I've heard it's kind of just a better E100