It’s not that we don’t like the Tango routes (T16, 14 & 9) it’s just that there is more to them than normal airways. So for those of us that are just used to bouncing around mainland Europe, it is more hassle or more interesting depending on your point of view.
As the previous contributors have said, they are in Oceanic airspace so even though you may only be flying from say Glasgow to Faro, if you use the Tangos then you will have to got through the full procedure of an Oceanic clearance. The R/T for which is different from normal VHF comms. Also, you are now dealing with Lat & Longs, which require careful entering & cross-checking, and fuel and Wx checks are much more tight.
Additional considerations for my type (737) are that we are not cleared for RVSM and some aircraft only have partial MNPS kit, so its down to below FL290; and we are not ETOPS, so we have to have combinations of airfields like SNN, ORK, OPO, SCQ usable.
I am sure that those who use the Tango’s or other Oceanic routes regularly think nothing of it, but for the rest of us, it is just a bit different.
S & L