I just need to do a X4 Zero Run. Its been a while since I played X2-X3 but heres my ranking of my favorite entries

1. X1
2. X4
3. X2
4. X3

X1 is always enjoyable, nice introduction to the X-Series(It was mine to Megaman) but X2 and 3 take a difficultly spike for some reason, maybe its the introduction to X Hunters and Bit and Byte inbetween stages? I wonder if X1 would be harder if there was bosses like them after beating the first two Mavericks. Overall I found X2 more enjoyable. Even though it was mostly luck beating Violen early on for Zero part since that stupid spikeball. I got lucky where he spammed his other attacks for a while which let me finish him

X3 was fine UNTIL the arms upgrade! OMG did I forget how terrible it was. It takes a while to get used to and throws my timing off. I found X3 to have the most backtracking to levels to get armors and upgrades.

X4 was pretty simple with X and now to do my Zero Run.