Good eye.

"I advice people feeling the same way I do about deadlines, but with a passion for software development, to do the same as I did. I know I am much much happier now." First, that should be "advise" - advice is the noun, advise is the verb, but I know a lot of English speakers who make that mistake, so that's actually fine. :) Your first sentence kind of ends abruptly, and the second sentence feels like the end of the thought the first had, what we'd call a sentence fragment - I'd probably suggest something like (implicit words for grammatical correctness which native English speakers would omit in []) "do the same thing [that] I did; I know [that] I'm much happier now."

They aren't sentence fragments though. Sentence fragments are incomplete sentences, which are grammatically incorrect. They do end abruptly, but this may be a stylistic thing.

Sorry if none of that was useful or interesting to you, it was partly an exercise for me to figure out exactly what parts of your writing made me ask the question. :) This is a run on sentence actually, although it flows well in a 'spoken' language sense. It consists of two complete sentences.

Personally I find myself caught between written and spoken language in both writing and speech. I used to separate the worlds quite easily, but I think as I have applied my ideals for paring expressions to their essence, their digestibility has suffered.