Kind of a silly question, but how many points do you guys usually put in these perks? I usually just put one point in Juggernaut, so I can use the rest of the perks, but now I've made a light armor character (two-handed Argonian) and I'm starting to think that I should invest 5/5 in Agile Defender to be less 'squeeshy'.

Should I be investin points in it or they are just not worth it?

With out a shield I don't think they would be wasted perks at all.

Personally I'd do it if you don't use a shield.
I'm sure that with agile defender you can also hit the armour rating cap, tough of course later then heavy armour.

Ever since I started using bashes and dodging more, I've stopped putting more than 1 point into it on my new characters.

Then again, I don't play on Master.

But yeah, if you're not using a shield, I guess it helps to have more.

thanks for the input folks

You can hit the armor cap with 100 in Enchanting/Smithing/Alchemy spending only one perk in the entire Light Armor tree IIRC. Though some people find this a cheap way to play, but to each their own.

Check out the Complete Character Design Freedom thread in the Skyrim Hints forum for more information.