Shrooms have to be my favorite drug so far, though I haven't done many. But I've noticed, ever since the first time I did shrooms my trips have been changing greatly.

The first time I tripped it was amazing... totally visual and not so much of a body feeling. Ties for the best trip ever (along with my third).

But Now when I trip I get less (barley any at all) visuals, more of a body feeling high (which is definitely NOT my favorite aspect of shrooms), and a sort of "spun" or speedy feeling which I HATE and usually get during the come down.

Every time I do them the "speedy" feeling gets worse, and I've waited usually 3-4 months in between trips before. I have noticed if I am outside (and it is still light out) the speedy effect is reduced... but not by much :(

Could it just be the shrooms I'm getting now are shitty? Or has repeatedly doing them (at least 14 times :D ) permanently altered my brain chemistry?

sounds like you haven't fully broken through.

Well if you mean experiencing ego death. No I haven't, the third time (6g dried) was very close it was frightening and beautiful at the same time.

Why would breaking through have to do with the horrible feeling I'm getting?

I guess my question is,
Have I done them so many times that the original feeling I got from them can never be reached again?
Or is it just maybe the quality of shrooms I'm getting?

Also, would tripping at night have anything to do with this? Maybe the reason I'm feeling sort of spun/speedy is because the trip last on into the night and sleep deprivation plays a factor?

Breaking through doesn't necessarily mean ego death. My guess is they are either a different strain (And therefore different levels of psilocin and psilocybin, so different effects), you aren't taking enough, there are some other outside factors that no one here will be able to tell you because we don't know enough about your situation, what you're getting aren't real mushrooms but possibly just inactive mushrooms that are laced with RCs (Yeah, believe it or not it can and does happen. I read a report a year or so ago where someone died of an overdose this way.), or maybe you just think you won't feel the same effects so you don't. The mind can be a powerful thing.
If you've taken "that many" I'm positive you can still get the effects you got the first time. When you've taken them a LOT and have plenty of experience, chances are you can get close, but not the same feeling. For instance, I really miss the laughter. First several times I took shrooms I laughed uncontrollably for at least an hour or two each time. I didn't even know why I was laughing, it was just a funny feeling I guess. Just try taking more next time and see how it goes. Only attempt this if you still have mushrooms from the exact same batch (not bought later from the same person who claims they are the same thing). Every batch of mushrooms can vary wildly in potency and can even vary quite a lot in the effects range. It's strange but the different levels of active ingredients really does create a different feeling.
If you really love shrooms so much though, I would recommend just growing your own. It's so cheap! For ~$40 you can get like 5 syringes, then spend like ~$25 to buy some mason jars, a fish tank, some plastic wrap, some vermiculite, and some perlite. I assume you'll already have a pressure cooker, most people do. But if you don't, go to Goodwill or something and get one pretty cheap. The jars, the fish tank, the pressure cooker, are all one time charges. And if you know what you're doing, you'll never have to buy more spores again either; especially if you enjoy the strain you received. However, it's fun to buy all sorts of different strains and grow them (in separate containers), test them out, and see which strain you like best.