Forum:About to play ME2 - Gameplay pitfalls like in ME1?

Having just played ME1 for the first time, I'd like to play ME2 soon with my character.

However, I'd like to know if there are gameplay pitfalls like for example in ME1, when you buy all shop licenses it decreases your chance to get colossus armor, savant biotics/omnitools, battlemaster armor and so on.

A seemlingy good decision that bites you in the ass later.

Things that make you go "Ah f***, if I'd known it would turn out like this I'd never have done xyz!".

I'm not talking about "bad" story decisions (but you can include those, if they have a severe negative impact), I'm talking about things like I mentioned above or - to give another example - things like not be able to complete side missions if you progress in the story too far/leave a planet too early and so on. Basically everything that impacts character progression/quests.

I hate falling in such pitfalls made by stupid devs, especially if I don't have an earlier save (I raged when I read about the licenses^^).

So thanks in advance for helping me, and if there are story elements which fall under this category make sure to use spoilers so you don't spoil other readers please.