Megaman X3 is horrible and they should feel bad.
Of course the best way to play 3 is to play the PSX version.
The stage design is stupid, half the weapons almost work the same. Enemies hitboxes are all over the place. Boss hitboxes are all over the place. Half the armor abilities are useless. I mean I guess combining buster shots is cool but it really doesn't do anything at all.
Speaking of armor, the SUPER ARMOR, you can get, which you can only get one of, granted you can go to another SUPER capsule and switch them out. But you have to go all the way back through a level. It's a pointless system. There is a secret gold armor you can use hidden in Dopplers stage they give zero hints of (neither for the Super Armors either) that combines all 4 super armors but if you already saved after getting one that capsule won't appear, because you already got one so time to reset the game! BTW, you need to be at full health for the gold armor to appear as well.
There are so many secrets that require you to use zero logic, even if you are actively looking for out of the way secret paths.
But and Byte and Vile can all die, good thing they tell you, granted, if you kill them they are replaced by worse enemies in the fortress stage. But of course you have to kill all 3 (or at least Vile) if you want to get the true ending. You know using Zero, which itself most people likely won't know, who can't go through checkpoint doors, to GO THROUGH a checkpoint door in the fortress stage, then die and give you his saber, giving you the real ending cutscene.
Although their hitboxes are wonky, if you have their weakness half the bosses just float left and right.
The game starts you off severely weak. An attack by a common enemy may take off almost half your health bar. You literally are gimped beyond any other Megaman X game. You will likely be trying to get the first weapon so you can have at least some offense while getting hammered. You'll likely be searching actively for the body armor or/and heart tanks. This game starts out full of crap but becomes pretty easy later on.
BTW Bit and Byte fights involve attacks that are hard to dodge because you are in small rooms that are smaller than the rooms you fight them in the fortress, and their sprites are way to big.
About half the stages you have to backtrack at least 3 times to get all the items.
OH NO! MAC WHY YOU BETRAY US ESTABLISHED MEGAMAN X CHARACTER FROM 5 seconds ago! REMEMBER WHEN WE FIRST ME 5 seconds ago! WHY MAC WHY!???
(sings) WIILLL YOUUU REMEMBER MEEEEEEEE!!!!!!
R,I.P. MAC, Intro of X3 to 78 seconds into the game.
Remember the good times when you paralyzed X and then kidnapped him and then Zero ha-
Wait what, fuck you mac you piece of crap.
(BTW this is not the first time they do this. They did it with Shadow in Command Mission as well)
! X3 does over-complicate things but overall its still a great time. I guess I'm the outlier here regarding the X Hunter fights but I outright loathed them across my X2 playthrough that I decided to say "Fuck it" and ignore them out right. 
