I've worn both and prefer a squid lid all winter. More flexible and natural feeling, particularly if your hood is not connected to your suit. I've had 'em dislodge on a nasty wipeout or two but never lost one. A snug fit with a good velcro enclosure and a small brim are important. You can get through the winter but I can only speak for South NJ and NC winters. Up North in Maine, NH, or MA you might need a full hood in the coldest months.
I get cold rather easily and I wear a squid hood all winter, its cold on the neck on duck dives from time to time but I hate how restricted I feel with a full hood maybe if I had a hood attached to my suit id feel differently. I live in the vb/nc area btw.
Where do you surf? If your in nj- in my opion- there is no way you are going to last 2 hrs (let alone even a half hour) on a 30 degree day with 38 degree water and 20 mph offshore wind in 8 ft surf. I would just get the attached hood and deal with it -You may just end up liking it. Plus- if you lose that thing - wally said it best- your asking for trouble!
i really want to get a squid lid, but i feel like id look like a kook.
Hahahaha! That's the beauty of it, brother... Then, when you bust your tail out the back and give everybody who's staring at you and laughing a cold, blinding roostertail across the face, you'll be flying the kook flag high!