I've been lifting weights up and putting them down for 16 years since HS. I'm a skinny bastard so I'm not doing it for weightloss, more for weight gain. I weighed 109lbs as a HS freshman, and 140lbs by the time I graduated HS. Now I'm just shy of 170lbs but as strong as I've ever been, still not saying much compared to some of these oxen out there but pound for pound I think I hold my own.
Anyways last year my wife got into crossfit so I tried it with her. The first week was amazing and I loved it. The grunting, the throwing weights, the encouragement. Fuck the running. I hate running, but I put up with it. After two weeks I didn't feel like I was getting the 'pump' I usually got from my normal weightlifting so I started going to the gym AND crossfit. Two weeks after that and I was burned the fuck out. I'm 32 years old, who the hell am I trying to impress? I quit crossfit, felt like a complete puss but I'm not injured and I'm not burned out anymore.
I plateau on my weight lifting every year, then I have a break through and go up a bit. I've been doing that since I started lifting. Two months ago I switched my routine to Jim Wendler's 5/3/1 and I am loving it. Before I'd go in and just do as much as I could in an hour, doing a chest/should/back/trap routing for days 1 & 3, and a bi/tri/legs/abs routine for days 2 & 4. Basically doing 6 reps of heavy ass weight for 3 to 5 sets, 3 or so exercise per muscle group. I think I was over doing it to be honest. Now I'm doing the 5/3/1 with a set program and gradual increase in weight after each cycle and I am seeing results already. Just one low rep core lift each day with two high rep accessory lifts. Some days I'm out of there in 30 minutes if I bust my ass. Sometimes I work on my typer sniper phd and it still takes an hour but the results are what I'm liking.
I don't know what the rules are on this site for linking to other sites but if you google "5/3/1 workout" and look for the "5/3/1: How to Build Pure Strength" from T-Nation, it explains it the best. I created an excel spreadsheet to take my 1 Rep Max (1RM) which then converts it to my Training Max (TM) (90% of 1RM) and then it breaks down each day on percentages of my TM for the programed lifts increasing in percentages with week one being 5 reps, week two being 3 reps, week three being 5/3/1+ reps, and then week four being a deload week of light weight. After week 4 add 5lbs to upper body lifts and 10lbs to lower body lifts. I've only just completed the first cycle but I've already noticed an increase in strength, which is my main goal. Why do I need strength, I'm a banker that sits at a desk most of the day... it's nice to have goals and being strong has never been a bad thing.
Wow sorry for the long read, this really got away from me.
TL/DR... Jim Wendlers 5/3/1 on T-Nation website.