Typically, languages tend to be "on the bandwagon". They tend to have nouns, adjectives, and verbs; consonants and vowels; cases, regardless of whether they are marked or not, genders, persons, tenses, aspects...
You can't make a language that has none of those things (if that were the case, the language would be completely null.) They will tend to share similarities somewhere. However, you can exclude a lot of them, such as the pointless genders, to make it less like [insert language here], leading to a more unique language.
Not sure what my point here is actually...