Even though that may be true, I tried to put the thought in the back of my mind and move on. In a couple of these situations, I created the first thing that came to my mind, no matter how outlandish I thought it was. More often than not, I found I actually ended up with some interesting designs, even though they weren't necessarily the most practical.
First, I made bookends with one of my favourite SuperMario characters.
I decided to put these two figures together because Yoshi transforms a pair of, otherwise, boring bookends, to a feature of any bookshelf rather than an eyesore. Both of these objects now present more like action figures, even though none of the initial practicality was lost.
Yoshi: https://www.thingiverse.com/thing:585767 by Coldfireagc, published Dec 9, 2014
Bookends: https://www.thingiverse.com/thing:2420075 by T-E-C, published Jul 5, 2017
Next, I put goat figures on each lens of a pair of Sunglasses
I wanted to do something completely opposite, so rather than making something more interesting/ not removing the practicality, I made something that removed all practicality the object ever had.
Sunglasses: https://www.thingiverse.com/thing:985064 by normeow, published Aug 26, 2015
Goat: https://www.thingiverse.com/thing:649717 by DViktor, published Jan 23, 2015
Returning to something more practical, I made a coat hook (or bag hook) that can suction cup to the bottom of a table. In this design I'm trying to improve how easy it is the lose a small portable coat hook, and how much easier it would be if something a little bigger was attached to it.
Question Box: https://www.thingiverse.com/thing:678683 by JRex, published Feb 12, 2015
Coat hook: https://www.thingiverse.com/thing:1119249 by mstewmakes, published Nov 8, 2015
Suction cups: https://www.thingiverse.com/thing:386187 by misan, published Jul 6, 2014
Next I made something mostly for the sake of irony. I made a flying device for a bird
Rocket: https://www.thingiverse.com/thing:427789 by gCreate, published Aug 14, 2014
Bird Box: https://www.thingiverse.com/thing:20961by mread, published Apr 13, 2012
Venusaur: https://www.thingiverse.com/thing:471932 by cyyeung1234, published Sep 22, 2014
Bowls: https://www.thingiverse.com/thing:1747831 by nikpin, published Sep 1, 2016
This next design is a depiction of a breakfast scene
Table: https://www.thingiverse.com/thing:1637723 by Dan2JCAD, published Jun 23, 2016
Chairs: https://www.thingiverse.com/thing:21830 by pmoews, published Apr 22, 2012
Cereal Box: https://www.thingiverse.com/thing:700136 by LordBananaMan, published Feb 26, 2015
Bowl: https://www.thingiverse.com/thing:386343 by SerialNano, published Jul 6, 2014
Spoon: https://www.thingiverse.com/thing:226875 by hacklabnobo, published Jan 15, 2014
Then I created a fish with legs, again playing with Irony. I created a fish that could walk on land, even though it never will be able to walk on land because it wouldn't be able to breathe
Fish: https://www.thingiverse.com/thing:1022910 by BridgerThreeD, published Sep 18, 2015
Legs: https://www.thingiverse.com/thing:1639450 by Forpost_D6, published Jun 22, 2016
Top Hat: https://www.thingiverse.com/thing:131657 by IonEwe, published Aug 11, 2013
I wanted to make at least one design where the material was the focus of the object, even though that's not the easiest thing to do in Tinkercad: For this design, I made a tote bag out of teddy bears
*Note- The file ended up being huge, and crashing the browser, so I took the picture before it crashed again, even though it's not perfect
Teddy Bear: https://www.thingiverse.com/thing:2041423 by freeoutlaw, published Jan 16, 2017
Tote bag (used as reference): https://www.thingiverse.com/thing:1170593 by scorch, published Dec 3, 2015
Robot arm: https://www.thingiverse.com/thing:408402 by fazzy, published Jul 27, 2014
Hairbrush: https://www.thingiverse.com/thing:1455262 by stano316, published Mar 31, 2016
To end on a high note, I created this after I created the Walking fish, I was experimenting with placing different animals on different kinds of legs. I call this design "What the Duck"
Duck: https://www.thingiverse.com/thing:139894 by willie, published Aug 25, 2013
Legs: https://www.thingiverse.com/thing:164159 by rith, published Oct 11, 2013