A single element delta loop doesn't have a lot of gain. Possibly a shade over a half wave dipole. But in its vertically polarised version it can give good low angle radiation, particularly if near salt water.
A challenge with the delta loop is how to feed it. That's because its impedance is quite a bit higher than 50 ohms. It's not quite like a ground plane (about 35 ohms, but higher if you droop the radials) or a half wave dipole (about 70 ohms, but lower if you make it an inverted-vee). Options include using a matching section (a quarter wavelength of 75 ohm coax multiplied by its velocity factor), some sort of transformer or open wire feed with a balanced antenna coupler. Open wire feed will allow the loop to work on multiple bands down to about 70% of the design frequency. The links below will give some good ideas on feeding this antenna.
40 - 10 m delta loop Comprehensive article by GU3WHN (PDF)
Multiband mono delta loop by DU1ANV (PDF)
$10 No transmission line delta loop Eham article by KE7WAV
Vertical delta loop Elmer Hour beginner guide from the Villages Amateur Radio Club (PDF)
Amongst the Kilowatts Part 1 I describe and demonstrate a 14 MHz portable delta loop (video)
Amongst the Kilowatts Part 2 More on my 14 MHz portable delta loop (video)
Start reading, start watching then start building. They're so cheap that you could even make several.
PS: Looking for even more things you can do with amateur radio? 99 things you can do with Amateur Radio can help. Available in both electronic and paperback.