Prism,
Dude.....you gotta find your groove and develop your Happy-Place. Cardio in & of itself is boring. I can churn the elliptical, walk the treadmill and do whatever in front of a tv for a while, but it's just passing time and not something I look forward to.
Here is what I do enjoy & why....
My most favorite cardio is Spin-Class. I NEVER thought I'd like it, but OMG it's great.....BUT...you need to find 2 things: a class full of woman or friends and even more importantly: a kick-ass instructor who brings the most excellent musical program to the class!!!
I have to admit, the best instructor is a guy named Tracey...he is MASTERFUL at his selection & presentation of music. He generally starts out with the lights off and some kind of warm-up music...but then he brings it up with an amazing assortment of songs, mash-ups, tunes and stuff that just makes the whole experience like a mix between a party, concert & workout. There's a couple of powerful songs where everybody gets moving to the same tempo and when you look-out across the room and see everyone cranking away....there's just an energy & magic to it. Seriously, I look forward to each class. On the flipside, a weak instructor with lame-ass music....and there goes the whole fun!
Mountain biking. Ah...the great outdoors! Get some tunes in your ears, find some nice long grinding trails and discovery the inner nirvana of sweat, pain and the accomplishment of reaching the end of your trail. It's also magical and heaven-like.
The pool...well that can be tough. The pool can be kinda dull & quiet, but if you drop a few bucks on a waterproof ipod case and some headphones, and get some good tunes...and you put together a nice routine with various strokes, it's also kinda fun.
But just being by yourself on a machine in the middle of the gym watching tv or something....nahhh, boring!
Try the spin-class. What I do is take a spin class and then do the swim thing...I call it my Spin/Swim program....it's awesome; you get the lower body AND the upperbody cardio...and you come out of the gym feeling great!
My whole motivation is to "do" a triathlon...so I'm training with all the components. I always wear my HR-Monitor so I can see my heart-rate and count the calories. Just develop a whole program and see if you don't get into it.