oomis, you get a credit, and a demerit. Bava Metzia 61b: It was taught in the house (bais medrash) or Rabbi Yishmael; Said the Holy One Blessed be He, were it only for this, that they do not defile themselves with insects, it would have merited the Redemtion from Egypt, it would be enough. They replied to him: the merit is greater than tzitit, and honest weights and (desisting from) usury? He replied to them: even thought the merit is not as great, they regard them (forbidden inscects etc.) with utter revulsion.
And, Sifra Kedoshim: One should not say, I don’t want the pigs flesh, rather he should say I want it, but my Father in heaven has forbidden it.
So you should really want that cockroach, but restrain yourself.