1) You could improve your stamina and recovery rate. Ever since January up to May I've been cycling like hell a lot and I've found out that I could go further without tiring myself and also, I could recover from fatigue quite faster than before. That's an improvement.
2) Feel faster. Feeling the breeze when riding a motorcycle is way different than achieving it through cycling. Even though you could only manage to go up to 30 km/h but you feel as if you're flying. Wait till you go downhill, it's way crazier and fun when you're going almost 40-50 km/h. That gust that blow directly to your face as you struggle to speed up is the best thing ever you could achieve through cycling.
3) Healthy mind. When you go on cycling you tend to forget all the problems that have been going on in your life. Even though you're alone, along the way you'll find new friends; guys who enjoy cycling as much as you do and you might join their pack. I think every cyclist have some sort of level of respect for each other because we understand how much effort we need to put in order to go for such distance; be it near or far; still, your effort counts every kilometers you put through that pedal.
4) Challenge. People always thought that big guys couldn't make it in cycling. In fact, they're wrong. I've seen guys way fatter and bigger than me, putting up way in front of me when they're cycling. You could be 90-100 kg and still be a cyclist. It's different than running and jogging. Running and jogging might wear you off due to your weight, but not cycling. At best, you might wear your legs but every little effort counts. You could start near; like 5 km for starters or if you feel that's just very short you could go for 10 km in the first try, but always make sure you have someone to accompany you to give you a little bit of drafting when you cycle. They always say; cycling in a group is fun, exciting and better to improve your performance. So take this as a challenge. Not only that, but I think that cycling makes me try to improve my time when going over distance. I'll try to make it faster and faster but the traffic conditions might vary every time; still improving my average speed and keeping a steady pace is the key for better performance in the long run.