Like you, I have full lips which are prone to dryness. Where I live, over 6 months of each year is exposed to cold temperatures and unusually windy days, so I really need something that works. I've tried Maybelline Baby Lips, different types of Burt's Bees, Twist & Pout, varying Fresh Sugar Lip Treatments, different types of Blistex, Chapstick, and Bonnebell lip smacker. None of these even compare to my favourites, which are The Body Shop Cocoa Butter Lip Care Stick and Clinique Superbalm lip treatment. I use the Clinique one at night and use The Body Shop one during the day.
A couple of products that have good reviews that I'd still like to try include: C.O. Bigelow Rose Salve, EOS, and Nivea A Kiss of Moisture.
p.s. I'm not obsessed with lip balms. hahaha I'm just really into skin & beauty and have tried a lot of products. :)