LordButcher I thought Windu's Vaapad was the most dangerous/aggresive form? Not being argumentative just curious
Vaapaad is actually a prototype lightsaber form that was being developed by Mace Windu and was actually based off of Juyo which is a Sith form. Of the fully established Jedi lightsaber forms Djem So/Shien is the most aggressive as its basis to overwhelm the opponent by countering their attacks with sheer strength i.e. knocking away the opponent's blade and quickly countering. All of the established forms have a kind of specialty of sorts.
Form I Shi-icho: Ease of use as it focuses on basic strikes and guards and doesn't go out of its way to be fancy.
Form II Makashi: Finesse based combat focusing on minimalist effort to execute parries, deflections, disarms, and striking at openings. It's good against Soresu because Soresu relys on tiring out the opponent/forcing them to overextend themselves which is the opposite of the Makashi philosophy.
Form III Soresu: A defensive form wherein users rely on technique, situational/environmental awareness and agility to tire the opponent out or force them to reveal a weakness to strike at. It's very good against brute force but not against finesse and usually requires the user to have some ground for strategic retreats.
Form IV Ataru: An acrobatic form that places emphasis on flashy moves to distract an opponent and attacking from odd angles such as with mid-air strikes to catch an opponent off guard. It's main flaw is that you need a fair bit of room to perform all of those mid-air/sweeping maneuvers but to someone like Yoda who is a master of this form that's easy to come by.
Form V Djem So/Shien: An aggressive style that focuses on reprisals. Users become masters of counterattacks both against saber strikes and blaster shots. The style's main weakness is that the user often has to fully commit themselves to offense leaving them with exploitable openings.
Form VI Niman: A balanced jack of all trades style whose focus is that it really has no focus. Against a user of a style with a focus Niman users often get overwhelmed when that area of expertise comes into play. Niman's strength is that it can a variety of situations and it's near impossible to really surprise the few masters of the style unless their opponent gets lucky/extermely creative.