Need your opinions

STOP PLAYING NOW!

Go back to ME1 & 2 then start again.

Some dialogue and actions change significantly if you do the first two games and then import your file.  Also, some dialogue and actions will change if you do the mission is a different order.  Some of the missions will not open until you're far enough along in the game to do them and, in ME3, some missions will become locked out if you don't do them before a particular mission or within so many missions of another mission.  These all result in different dialogue and consequences occurring.

For your first playthrough, I agree with the others here.  It is best to play the series from the beginning and import your save into the next game.  You get access to a greater amount of the game's content that way.  There is also quite a bit of mission generating DLC available for each game... and playing it in ME1 and ME2 also adds quite a bit of related content into ME3.  However, it will depend a little on how you feel about spoilers.  Some of the additional content you'll get from an imported playthrough will be hinted at in your current playthrough.  If you do go back and playthrough from the beginning now, keep your current save and finish it on a replay... so you can experience the differences between an imported save and one that just starts with ME3.

After your first playthrough, you'll probably find yourself replaying it differently a few times... changing choices, flipping around with the order of things, skipping out on some missions, etc. just to see what the different consequences are throughout the games.  Warning... playing ME can be quite addictive.

The combat in ME1 is quite a bit different and it is a much older game than ME3, so do cut it some slack that way... but it is still very fun and still some people's favorite of the Trilogy.  Enjoy your playthrough!

I will be back to discuss it . I love this community and the game.

I'm not sure what to recommend. But I'd be interested to hear your perspective once you're done.

Have fun! And welcome!

Finish it.  I mean, why not, right?  Then go back and start over from the beginning.  It'll add so much more to the story.

Priority missions mostly have to be done in order, except for the DLC (From Ashes, Leviathan, Omega, Citadel).  The DLC can be done in any order once they appear.  Non-priority missions have a chance of expiring so it's best to do them before any of the base game Priority missions to make sure they don't time out.  

I read through a couple of pages from that thread.Interesting stuff.I love reading through all the little details.
Also people's perspective on how events played out.Sadly i don't think i can start ME1 before this coming wednesday due to my schedule becoming a little hectic these days.
But come wednesday i will be sure to check back in.

As far as mission order goes, there's one rule of thumb I always apply in ME3:

Priority missions should be done last.

There were a few instances where I did a priority mission first, and afterwards found out that I couldn't do the side missions for that planet any more. Rannoch for example. I think Tuchanka has the same problem.

For those who didn't know.Turian bomb mission can be done just before Cronos. Doing it that way gives an extra line of dialogue from Hackett.

It's one of my all-time favorites with gaming ever.  Used to be either KOTOR or Fallout 1 and 2 (3 and 4 are less interesting to me).  That said, I only found ME earlier this year.  I think it worked out better for me.  I got to play them in quick succession.  I think the result is that I didn't see any of the major flaws (or at least they didn't bother me) that fans of the series since 2007 have noticed for a long time.  But even those people are still playing...