I hate them, particularly full-stops , killer of all known sentences ; which is why we should use them sparingly. Colons are also really, really disgusting, more about these undesirables later. Commas can be fun and semi-colons too as you don't use a capital after usage. It's Colons and fullstops that are really crap. Try to avoid them at all costs. This way knowing you have done your best to save a few badly written sentences.