T1, T2, TSCC

T3 was the first one I watched with my siblings so it holds a special place in my heart. I would recommend just for the fact that it is an enjoyable action movie even if it does not have the reputation and aora of greatness the previous 2 have (the ending was also very deep which I initially didnt like but I grew to embrace since it is the only ending that has skynet win and that is unique since almost always the good guys win instead of the bad). TSCC I watched last year and enjoyed the hell out of. Best sequel and continuation after T2 in my opinion. Some of the fight scenes are cringey yes, but they delved deep into the true mission and perspective of each and every character.