Buying any stock is a 50% probability of profit shot. DDD is beat down and has earnings Mon morning. SSYS just had earnings and is beat down. Maybe a good buy if you like to buy into weakness. For me the options market is too wide in any of those for a strategic play.
However HPQ has earnings coming up....the expected move should be around 2-3$. Selling a strangle at the expected move the day of the earnings in the nearest expiration might be worth it depending on how the volatility is. With around 70% probability of profit and a return on capital of about 3-4% if you buy it back at 50% max profit the next day.
Just buying HPQ right now would be buying at a high and it's just following the rest of the market anyway...but if you sell calls against it as a long term cost basis reduction strategy....you will reduce cost basis on the first month by .95 per share giving you around a 65% probability of profit and then prob around .70+ per share (on the monthly rolls at 7-10 days to expiration)....per month after that.