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Nr 1. is interesting, it could belong to the family Micropezidae, one of my favorite families.
Nr.2-3. belongs to Dolichopodidae, subfamily Dolichopodinae.
Nr. 4. is not a Diptera, but belongs to Hemiptera Sternorrhyncha.
Nr.5. belongs to Empididae (or Hybotidae) I think, not ot Asilidae.
Nr.6. I am not sure, but could be an Opomyzid fly. Others will surely correct me.

Please post your images belonging to different families in different forum threads.