Here is what I found from surveying other students my age:
Design Style/Period:
Many people like the Scandinavian design period, with Scandinavian design taking up 35.2% of the preferred design style
The least popular options include neo-futurism and streamlined moderne
A large portion of the surveyed people chose cubism as their favourite (20.3%)
Shape:
The most popular option here was tied between Octagon and Circle (26.8% each)
The second most was triangle (14.3%)
The least popular options were rounded rectangle, myriagon, line, dodecagon, Oval, rounded square, rounded rectangle, doughnut and MacDonald's logo (All 1.8%).
Numbers:
In this question, Roman numerals took the top spot with 44.6% of all votes.
Tied in second, Base 10 numbers and No numbers had 23.2% of votes.
Size:
This test was very even, however, medium slightly edged out extra large to take the top spot with 37.5%.
Extra large was the second most popular with 35.7% of votes.
Large and small both had 10.7%.
Extra small was the least popular and only had 5.4% of votes.
Material:
In terms of material, wood edged out all of the other materials by more than double (48.2%).
Mixed came in second with 28.3%
 Acrylic and metal were next and they got 17.9% and 7.1% respectively.
Colour:
This test had a large amount of variety.
Brown ended up on top with 28.6%
Mixed had the second most votes with 17.9%
Black and blue had the third most with 10.7%
White and red had the next most votes with 8.9% of votes.