I'm not hat'n on T-tar, I just prefer Hydreigons design by far. Tyrantar is my third favorite pseudo, actually.
My order of pseudos:
My rule is that you should like a Pokemon based on certain traits. 1 is most important, 2 is less important, etc.
I generally don't care about a Pokemon's usefulness when choosing favorites. I like Ledian a lot more than Heracross, but Heracross is a lot stronger. Who cares.
I usually ignore nostalgia too, but there are some exceptions. I like Feraligatr and Crobat largely due to nostalgia.
That's just me, through.