Re: Most trivial quirk, most useful perk, least useful perk, and most severe quirk.
 

In GURPS rules and examples are both subject to GM approval for the setting. "Dislikes carrots" wouldn't qualify as a perk in a GURPS: Star Frontiers game (there are no carrots) but might be a actual disadvantage in a Bunnies & Burrows game (where it might be a combination of Restricted Diet and Social Stigma).

Re: Most trivial quirk, most useful perk, least useful perk, and most severe quirk.
 

One of my favorites of all time is Weapon Bond for knight-like characters, since I find it thematically appropriate that they've become a master with their ancestral, inherited weapon.

Re: Most trivial quirk, most useful perk, least useful perk, and most severe quirk.
 

I can't think of any nice guy character I have built who does not have broadminded.

I generally prefer likes quirks to dislike quirks as I find they do a better job of defining the PC.

Depending on the setting classic features can be pretty useful -classic features : athlete, academic, gymnast, or cheerleader is going to get its applicable bonus very often in a university setting, as well as making it easier to become (and remain) part of those groups.

As far as perks - high heeled heroin , or 'suited hero' allows you to claim the +1 appearance level from using fashion sense while still being capable of participating in athletic or stealthy activity.

Accessory can be really potent.

The combo of weapon bond and named weapon is great.

Re: Most trivial quirk, most useful perk, least useful perk, and most severe quirk.
 

Who wants to be a shapeshifter always naked post change? That's going to cause all sorts of problems and difficulty in maintaining secrets.

Re: Most trivial quirk, most useful perk, least useful perk, and most severe quirk.
 

I'd pay for Pet just so I could feel justified in socking a GM that endangers Captain Fluffy Bottoms.

Re: Most trivial quirk, most useful perk, least useful perk, and most severe quirk.
 

My character in an upcoming AtE campaign has a Maine Coon with him, called King (because he's lazy and entitled). You can be damn sure I'm buying the Pet perk for him - the post-Apocalypse is no safe place for a cat!

Re: Most trivial quirk, most useful perk, least useful perk, and most severe quirk.
 

My mom lost a cat to coyotes not that long ago, and she's barely in the wooded area miles from the Portland metro area of Oregon.
The smaller you are, the more dangerous the world is.

Re: Most trivial quirk, most useful perk, least useful perk, and most severe quirk.
 

Yeah, Broad-Minded and Chauvinist are so broad that I can interpret basically any character I've ever played regardless of his overall attitudes as having one or both for one or two free points depending on whether or not the GM deems them mutually exclusive.