Let's see . . . speaking only for myself (and as an ex-house tech), being a house tech doesn't make you old, but, if you let it, it might make you fat and bitter (laughing). As a house tech, you get to go home every day and eat regular and you don't run around as much in between outages while at work. And if you don't remember that is only your job and not your life, taking everything personal can make you bitter.
I'm firmly convinced that "getting older" is more attitudinal than anything else, so I always guard my attitude. You gotta remember to laugh a lot and enjoy your time away from work. Don't take your job home. Heck, I know a lot of road techs who take their jobs home and get bitter, too.
I work for a paycheck. The paycheck let's me enjoy my life. Heck, staying out of debt let's me enjoy that paycheck, also.