What was your first tier ten and why?

Einzelganger7: E-50 M, I didn't saw it as a worthy tank because it only had better standard penetration and a bit better tank traverse compared to the tier 9 E-50 but I just got it because I had it researched and was able to put a discount on it during the christmas event of 2017, I basically got it just for curiosity to play at tier 10 and didn't liked what I saw due to the premium ammo spam so I sold it after some time and stopped at tier 9 on the other branches Ive gone through.