I searched, but since everyone's problem is a little bit different, I'll try to explain my situation as best I can.

Car smoked a little. Blue, not white. Mainly after start up after it's been sitting for the night. Cruising, it never really smoked, but under heavy acceleration it would. Wasn't sure if it really could be the rings, because compression test dry showed around 190 for all cylinders, and the sleeve walls were perfect with no scoring at all.

Exchanged it with another used head I had. Smoked even more than before. Old head had hardly virtually no resistance on the valve seals when I put in a valve and slid it up and down.
Got new valve seals installed, and you can definitely tell that they're doing their job now, as you actually feel the spring giving resistance when you first put them in, and then just general resistance going up and down. I can change rings if I need to, but if they aren't the problem, then I don't want to bother.

So in a nut shell, head smoked, replaced with other head and smoked more. Dry compression test is around 190 for all. Smoke isn't even. Almost all the time after I start up the car for the first time for sitting for 10 hours or so, sometimes less. Goes away after a bit and hardly any if none while just cruising around town. Get on it hard and it smokes quite bad.

Any insight would be really helpful.