My favorite type of harness is the 5 point harness since i have one here at home.
As for amusement ride i am kind of nostalgic for rides that have a lapchain such as the roundup or the flying scooters at seabreeze park in rochester or the heart flip (which i have never been on.
Another one that i like is the chest strap on the Chance Yo Yo since the ride uses a seatbelt/strap (whatever you want to call it) in a unique way, surprisingly the strap doesnt hurt me even though i am a women.
I like rides that have an actual seatbelt (of some type) vs rides that have a lapbar or some kind of shoulder restraint
The restraints i most want to try are the ones on the chance or herschell rok n roll (or herschell looper), 6 inch seatbelts!!!!!, i would also like to try out the seatbelts on a watkins tempest or a watkins hustler!
The restraints that i hate the most are probably the shoulder loops on bumper cars, thankfully majestic issued a service bulletin that solved that problem but i had some bad experiences with them before that...
I also dont like falling star type rides such as the wisdom avalanche that have shoulder bars, it just doesnt work for that type of ride, the rainbow has much better restraints with just a lapbar, the shoulder bars hurt when you crash into them when the ride is going up, i imagine its even worse for taller people.