The Reds boast an unbeaten start to the Championship season as they head into tomorrow’s City Ground encounter with Birmingham (kick-off 3pm).
They have impressed many observers with their early season displays but O’Driscoll feels they have been too predictable at times.
And the Forest boss believes the arrival of the likes of Billy Sharp and James Coppinger will bring a surprise element to their displays.
Sharp and Coppinger, loan signings from Southampton and Doncaster respectively, could make their full debuts against Birmingham.
And O’Driscoll told Forest Player: “There are certain parts of the game you can’t change week in and week out, day in and day out.
“We’ve tried to focus on those things and make sure that the structure for dealing with those is as rigid as it possibly can be.
“But in the rest of our game we want to be unpredictable; let people play with a freedom that they enjoy and hopefully that people who come and watch us will enjoy.
“We look like we’ll score goals – we’ve not probably scored as many as we should but we’ve created an awful lot of chances and opportunities which is good.
“And apart from nervy five minutes at the end of games we’ve looked quite solid as well.
“We’re ticking both boxes at the moment – we’ve just got to make sure we continue to do that.
“Billy is a goal-scorer and you can’t have too many of them in your squad and James is a bit like Simon Gillett, he’s the bit of the glue that we need and gives us another option on the right and doesn’t make us as predictable as we have been.”
Forest have claimed two wins and two draws from their opening four league games, while Birmingham claimed their first Championship win of the campaign in their last outing, against Peterborough.
O’Driscoll added: “We’ve got two tough away games coming up and will want to be organised and hard to beat and I’m sure Birmingham will be exactly the same when they come to our place.”
Tickets are still available for tomorrow’s npower championship clash with Birmingham (3pm). To buy, visit The City Ground megastore, click here to book online, or call 0871 226 1980 (calls cost 10p per minute, mobile rates may vary).