I think you have potential to be a decent designer, however you need to work on your material. I agree with YKH, that if these are your strongest products…graphics are more your forte. I was wondering what was up with the wheels myself; you figured out some form of levitation…you have got to let me in on it. Makes the design look rushed, unfinished, and makes it look like you do not stress the details enough.
You mention most of these were ten-week projects, yet the only one that appears to have ten weeks of development time is the Go Postal.
Come on now, ten weeks is a long time for a project, I usually have 6-10 weeks to complete and entire development program from market research to having the final functional prototype tested, and photographed for the marketing materials. Only exceptions are the medical, and government contract work…then I have 3-4 months.
My suggestion for the product section is to revisit each of the projects, push the forms further. Most of the forms are ho-hum and what you would expect…as YKH pointed out quick solutions. I would suggest spending @ 20 hours concepting out additional forms and solutions for each product. That should give you 40-60 concept sketches (stay fluid and loose, do not get too tight to soon, that is my biggest personal struggle), then spend @ 40 refining these down to the final design. It is a good idea to show the final design in context of use, ie the cyclist, however it should be evident that the product had more time spent on it. Best way (IMO) is to lighten the person, simply line art the person, or color render product, gray scale the person.
I know it seams like a lot of work, but I know a student who graduated the year before me, spent 2 months right after school looking for work, never even got a call back. Was feed up, but did not give up. Even though he was working 10 hour long midnight shifts at a local manufacturing plant to pay his bills, he was in our “Senior Studio” (a house off campus the seniors rented for 24 hour studio space) from 9:00 am to 5: pm mon-fri, and all day sat and sun to work on his portfolio pieces. That lasted my entire senior year. That May he sent out one portfolio…Hired the day they received it. Paid moving expenses and for an apartment until he found a house, and 45k first year, midwest area.
Moral of story, you will get out of it what you put in to it