Well, on bass I tend to like higher tension, especially on my low E, so I use a .110 there. That gives me both the huge low E I crave and doesn't get floppy with a D.
On guitar, I either mostly use LTHB (RH in Fender parlance) .010 - .052, or increasingly I use .011's on some of the 24.75" scale instruments.
I don't like either the sound or feel of lighter gauges. And higher tension also equals more stable tuning.
I don't worry too much about the equal tension across the strings (like D'Addario has been marketing lately), but I do look into tensions if I'm contemplating doing something unusual to make sure it won't be crazy high or low:
tension=(frequency*(2*Length))^2 * linear density
And I don't worry about it in terms of the length of the non-speaking part of the string in terms of bending and feel and whatnot.