You're not the only one my comrade. However, while you look at it in a more realistic sense, roaches are filthy and they eat shit. Literally. They also carry some diseases if you ever got bitten. And yes, they do bite.
In a more animealistic sense, Gokicha and the other roach is definitely cute. Btw, I like that part-timer... She always encounter Gokicha...
Now, if cockroaches do indeed clean, then that's a very different matter. Spiders are actually needed you know. They eat flies which are also disgusting... But back home, we play them spiders... let them kill each other! MUAHAHAH!!