You have a few beautiful logos in there. I particularly like the Qualy, Sky Inx and centrexIT logos. Well, I like the symbol of the centrexIT logo. The typography could be better.
The typography is actually a concern. It seems you have a tendency to use small, tightly kerned typography. First off, tightly kerned typography is a trend from the 90's, so rather avoid that. Secondly, you need to take into consideration how a logo looks at small sizes. If the typography or the symbol becomes too obtrusive or is simply too detailed, you probably have to design an alternate version of the logo so you have a default one for normal to large sizes and a second one for use in small applications. Let me point out everything which should be improved on: Prestige — The slogan is too small and too tightly kerned. You also need to manually kern RE in 'Prestige' because there's too much space on the right side of the /R. I'm not sure Trajan is a good choice, either. It's overused and outdated. Asemera — It's too tightly kerned. If you kern a bit more loose you will also create a more consistent rhythm. With letters like A, L, V and W you often have a lot of empty space on one side. If you kern everything tightly, you can essentially make each letter touch, but A, L, V and W will still feature a lot of negative space. With a looser kerning the big empty spaces around these specific letters become less obvious. In your logo however, you will see that the two A's are quite far away from the other letters. Zoomfx — Not a bad logo, but the M is too wide, and perhaps it's a better idea to merge the stems of M and F. Right now you have a double stem, which is just too bold compared to the other letters in the logo. centrexIT — The typography is rather small, and I would rather use small-caps for 'IT''. Capitals are too obtrusive here. Gore & Dod — I like the symbol, but the typography is absolutely terrible. It takes too much effort to read. GreenWatt — You really do need to learn about kerning. Or at least set the kerning to "optical" rather than "auto" or "metric". Look at that huge amount of negative space between /W and /a. Gamer Production — Typography could be a bit bigger. Inbound — The "IN" part is bad practice as you're going beyond the x-height and the weight is inconsistent with the other letters. "Authority" is placed too close to "Inbound". Mike L — Nice logo, although I would choose a bolder font so the contrast between the symbol and the text is not so great. Paintbox — The "interactive" part is not clearly legible. Also, it doesn't horizontally align well with "Paintbox". Polary — "designs" is too hard to read. TU Tone Tile — Beautiful logo, but the yellow is simply too bright on a white background. The Otis — This is interesting. During the concept phase of the Tunderman branding I actually had this exact design sketched out. I didn't use it though. Anyway, the typography is too tightly kerned. Also, this kind of font without spurs will function well at display size, but it quickly becomes too hard to read if you use it at small sizes. Mid Phase — "Premium hosting" is way too small. Sky Inx — ".com" is too small.
I've seen that you are good with typography, and I think you are right, I just used fonts that are already made, so I didn't change them a lot. The ones you choosed are most from 2011, when I was still learning a lot of things. I haven't put some better logos which I made in 2013.
You don't have to change fonts necessarily, but keep an eye on how typefaces look at small sizes. Not all fonts are optimal for that.
Anyway, you're a good designer. I just thought I would help you to the next level by giving some advise on typography. If you want to know more, go to my profile and read the Journals 'Mastering Typography' and 'History of Roman typefaces'.