I've tried them all. Test is test. I prefer ena or cyp.
Sustanon (and all other blends): over-rated, over-priced. You can doubel your dose on ena or cyp in the first week, or use prop the first week with your stack and get all the benefits of sust.
Prop: cost a little less to home brew, but a lot of work to suspend without tons of alcohol (hince the pip). Bad pip from injections. If using another fast injectable like tren ace or masteron, it is easy to toss into the mix... otherwise over-rated.
Cyp: if homebrewing this is your go to for the slightly longer halflife than ena. Best all around test for ease of use (perfect blood levels on once a week injections... requires less alcohol to suspend so no pip).
Ena: if not homebrewing this is your drug of choice, as $ per mg it is generally the best test, and is massively available worldwide. Even in the UK this can often be had as low as $3-4 per amp.
Once it is in your system they are all the exact same, the only difference is the rate of release.