Same, having alts tos, bs and pom, i tried at start to use heal rating gear, thinking it would be useful, but on the long, i eventually felt that my contribution to the group was way better with aggressive gear.
And frankly, if you can't keep the group alive with your regular heals, then the issue lies somewhere else than in your lack of heal rating.
All in all, going full dps is way more rewarding, as in it is more fun, and makes you bring more on the table for the group.