I chose mobility mods.. though actually what I really do is to snap em up as toys

(judging by the amount of snapped fit unfinished models I have lying under my bed.)
When I first started out doing models, my style was more towards making the detailing on the kit line art accurate. Well this was a neccessity back then when kits weren't made with as much details/accuracy as the new HGUC line up.
Nowadays, I tend to add mobility to my kits, because: -
A. I am fickle minded and can never decide on a pose
B. I'm pretty bad at designing custom colours or decals so having a bad ass pose is the only other means I know of that can attract attention.
A new thing I'm trying out on my current kit is to alter proportions by beefing up certain areas and slimming down others. I must say that I'm enjoying this quite a lot, and it may one day become more important to me than mobility mods. :)