Peercoin POS is not user-friendly, in my opinion. To, mint, the wallet gets unlocked, and at that stage is the wallet secure? Information and security of the minting process is limited. Plus, having set up the minting process perfectly OK on other coins, not managed to get any POS from PPC, ever, despite going through the process and waiting months, following all instructions etc. Seems that other people find the instructions hard to understand:
https://bt.irlbtc.com/view/187714.100

The new DPOS from Bitshares sounds very carefully thought out, and promises to be faster - its not released yet though. I hope its fairer than PPC.

The huge overlooked flaw is that it's not really distributed consensus.

Well, it could be argued that it is. 

But to me its not a good system because you have to trust the
supernode you voted for, etc.  You get into the whole trust
thing, almost like voting for politicians to represent your interests.
I would much prefer the whole thing be trustless and governed
by math and protocols like Bitcoin.

Do you really think bitcoin is a trustless system...?

don't waste your power (prepare for major release on monday):
https://bt.irlbtc.com/view/623761.new#new

Isn't another issue is you need your wallet open to "forge/mint"...
That seems bad for security.  Not sure if that's an issue
with just NXT, or applies to Peercoin and DPOS as well.

You have to understand that cryptography secures your wallet not the network. The network is secured via consensus. Bitcoin as with all proof of whatever systems is a resource democracy. It is the natural structure for decision making of all distributed organizations throughout history. If you have 51% of the capital in the world you run it. This is the same phenomena with bitcoin proof of work. Your say over the network is proportional to your share of the designated resource, with bitcoin that is hashing power. Miners delegate there hashing powers to mining pools and those are the people you effectively trust to run the network. They are like the board of directors of the company that is bitcoin.

Every resource democracy works the same and is subject to the same 51% attack. The problem with bitcoin in particularly is that the capital intensive nature of mining disproportionately advantages those with economies of scale and ultimately centralizing the decision making powers. These are not trustless systems, rather you are distributing  trust amongst your peers with hopes that at the very least 51% of them are trustworthy. Regardless of the system, you are not trusting math you are trusting people.

Nxt doesn't require you have to your wallet open to forge.

Website says this

I would vote for NXT but I am not allowed
it seems it is well built but the distribution is not so great !!
oh well so is BITCOIN ;-)