As with the English language, Spanish is under assault from the internets and text messages. This need to abbreviate is the same: 'see -> c', 'you -> u', 'are -> r' have equivalents in Spanish. There is 'of = de -> d', 'that/than = que -> q', and there is also 'also = igual -> = sign'. Best of all, 'because = porque -> xq', q from que, and x from something like '2 for 1', which is '2 por 1' which is abbreviated to 2x1 in Spanish. Of course, if 2x1 means '2 by 1' to you, this chain of logic makes no sense.
However, Spanish is immune from one bastardisation that English isn't, because being Latin based, its verb have a different conjugation for each person, and thus personal pronouns are irrelevant to begin with. Not so in English.
"What are you talking about? I went to school in Straya where they don't teach grammar. Explain, Liz Lemon."
Well, our verbs have 2 conjugations in the present tense: the infinitive, and the infinitive with an s at the end. For example, 'to walk' or 'walk' is an infinitive. This conjugates, of course, in present tense to 'I walk', 'you walk', 'he/she/it walks', 'we walk', 'you walk' (or 'yous all walk' if you're from Broady), and 'they walk'.
In Spanish, the infinitive is 'andar' (which should look familiar to any I-talians), and this conjugates to 'yo ando', 'tú andes', 'él/ella anda', 'nosotros andamos', 'vosotros andáis' and 'ustedes andan' (which will not look familiar to Italians - the Spanish here is purer Latin that your ugly irregular andare).
So, the point is, in Spanish you don't need to say 'I', 'you' etc before the action because the action tells you who is acting. But in English, you have 'walk' for 'I', 'you', 'we', 'you' and 'they'. So when someone says on the internet "Looks good, can't wait"; who or what looks good? Who or what can't wait? Or, my favourite from a shopping centre "Hope you enjoyed your visit!"; is that a threat?
Now, next time you are about to assault the language to save half of one second, put yourself where I am - put yourself overseas and imagine yourself trying to learn a language with all the interference of people being lazy and making it difficult for you to know what is correct. Now look outside your window and see how many folks around you have to put up with just that from you.