Views in part are down to the photograph, but are also down to when the picture is uploaded, how many other photographs are uploaded the same day.
Many people browse the database by the "Most popular in last 24/48 hours" view. If your photo appears on the database early in the day, it will be displayed in that view for almost 48 hours - from when its uploaded until mid-night Swedish time the following day. If its uploaded at just before midnight Swedish time, it only appears in that view for just over 24 hours. In the case of the late-upload, many other pictures the have appeared earlier on in the day will have already got a head start on in terms of hits, and therefore the new upload will be further down the list - the further down that view it is, the less chance of it getting high hit counts.
For this very reason, I am always pleased when my pictures first appear on the database in the early morning, and am slightly annoyed if it first appears on the database close to Swedish midnight!
Furthermore once a picture gets towards the top of the "24/48 hours" view, the whole thing becomes self-perpetuating. If its high up that view, there's a good change it'll get fairly high up the "weekly" view, meaning that it will be more easily noticable to those who scan the weekly view and will therefore be more likely to get yet more hits. And so on...
Finally, if your picture is uploaded on a day when there are few other acceptances, it will be noticed by more people and will therefore get many more hits. If your picture is accepted on a day when there are hundreds of acceptances, it will still be noticed if its exceptionally interesting but if its a run-of-the-mill sort of shot it'll get far less hits.
Hit rate therefore is partly about uploading interesting shots, but it can also be about when the picture was accepted, and what else was accepted in the same day.