yeah, tropicana is animal derived! grrrr.
as for milks... silk soy light milk is lighter and may be easier to drink for you plain. i dont like soy milk straight myself, particularly, but i like this one.
dont give up on the soy/rice/ almond milks though, they vary sooooo much from brand to brand.
people seem to really like rice milk, i have yet to try it straight, though ive had it in things. i like it.