I buy Driver Coil. Sometimes I even buy it up to 6.
I don't PvP; I doff instead. I like my ships to go fast.
And it's a Tier 1 skill, so 3 or 6 levels in it are the same cost as 1 or 2 of the top tiers.

Similarly, while I am liking the damage of the Dyson grav-pedo, I hate that it (the heavy version, at least) is so bloody slow. Like, plasma torp slow. On several occasions, my forward launcher has actually reloaded before the first one hits the target.