After taking mushrooms I have a general feeling of well being. This doesn't always happen but when it does, its great. For weeks after I seem to be less stressed and just be more able to tackle the obstacles ahead of me. Instead of a crushing feeling from a load of work piled up I feel like , well, that is a lot to do, let's get crackin'. Does DMT provide this kinda of benefit.
Mushrooms are often talked about helping with depression, how about DMT?

Yes, but it depends on ROA, set & setting etc.

For example, people I have given pure DMT have been blasted in hyperspace and had hard time to absorb the experience, but they quickly returned to norm in the same day. The effects were more lasting with mushrooms.

However, DMT after oral harmalas had much more profound effect. People reported having more energy, being more sexually active and having better sleep for a week after the session.

There are first hand personal reports from people I know. I believe you will find more reports on Erowid and here.

Ayahuasca definately has this effect to a greater degree than vaporized DMT. At least, for me personally. I also find it more beneficial than shrooms, in this way.
Harmala alkaloids also play a part in these beneficial effects.

So yes, for ayahuasca this is absolutely the case. Vaporized DMT is more fleeting, in my opinion. But it can be beneficial for sure. It depends more on the nature of your experience.

Deep spiritual experiences always have a profound impact on your life. And DMT is definately capable of giving you that.