As of 2015, my home QTH is the 3rd floor (top floor) of an apartment block in Bailiff Bridge. No opportunities for outdoor aerials exist here and so things are a bit restricted. I will have minimal access to my old QTH’s facilities for the next few months but essentially I’m limited to 2m at present.
My 2m aerial is a 5/8 whip with a magnetic whiteboard underneath it situated on an ironing-board! Currently I’m running low power from my Kenwood TH-F7E into a Mirage Linear and getting about 25w output. Adding more foil around the ground plane seems to make a significant difference!
HF aspirations are looking at the possibilities of a magnetic loop construction project.