when shopping for plain old t-shirts... go into the boys section. like, the young boys (i mean, like your kids section). they have so many fun shirts and most likely their large sizes will fit you! they're usually cheaper than women's shirts and if they're on sale, watch out!!!
can you tell blake and i just went shopping and i found tons of fun surf shirts in his section for me???
ps- i just realized that maybe this only works for me because i have no boobs. so if you actually have a chest worth writing home about, this tip might not work for you.