Someone ave ever play the first opus of theses games?
ave play 3 and 4 but not the 2 first... do they are good compare to the others?

I've played HoMM2 as well as 3 and 4. Personally 3 is best out of the 3. Har har har. But seriously after playing 3d it just doesn't hold up too good. Looks kind of awkward, plays and feels almost the same though.

the 3 is also the one I prefer

HOMM3 is still the best of the crowd, but HOMM2 is also very enjoyable (still).
The first installment is a bit simpistic and dated by now, HOMM2 was a huge improvement over HOMM1.

To be honest, I like Heroes 5 with expansions the most of them all. Great graphics and aswesome spell effects are what makes it better than others. Because everything else is pretty much the same as in my favourite HoMaM 3. And I really like the addition of paraler upgrades for every unit in Tribes of the east

weird, i liked the unit design and spells of the third one, everything looked kinda neat in 2Dd, i have mixed feelings about the 5th one gameplay is almost the same but there's something about the design i don't like.

I played numbers 1, 2 and 5, and tbh, I think 2 nailed it for me... but it generally just felt like the same thing redone in 3D for 5.
I also found the story mode essentially useless, I much preferred just having random skirmish maps or multiplayer, essentially playing it a little like Civilization, which goes really well if you can get the pacing right.
Coordination of multiple heroes was always an annoyance for me, much preferred having one "best" hero, and another just to pick up random stuff and ferry troops around.

When I was playing the 4th I was loving making a army of only heroes and pass the campaigns... but I prefer the 3th style whit magic only heroes.

I've only really tried 5 which held my interest for about 10 minutes. I guess the potential to absorb me is there though, because I love the recent kings bounty.

HOMM2 --> My first. Hours and hours of hotseat addiction
HOMM3 --> Better than the second. Probably best on the series. Hotseat addiction x2
HOMM4 --> Less tactical but funnier. Also very good for hotseat.
HOMM5 --> Meh. Didn't like the different maps. Very slow. Boring overall.

I've only played 2 and 3. Of the two, I think 2 is the best. I didn't like the whole "underground" thing in number 3. It seemed to me there was always an entrance right next to my castle, and whenever my hero got too far away, an enemy hero would pop out of it and take my castle. Also, I downloaded a shitload of very enjoyable user-made maps for HOMM2, so I had a wide variety to choose from. I'd love a remake of HOMM2, but whoever made it would probably insist that it be done in 3D :-(

I've played heores 3, 4 and 5 and the one I liked best was 4 with all extensions.

My views as a latecommer fan:
HOMM1 and 2 - way too old for me to really like them now - very dated, though 2 is the most playable
HOMM 3 - This feels the best of all the games, balance is good; there is a wide range of different armies to choose from; gameplay mechanics feel polished and working and the game has an overall feel to it that makes it fun. As someone that came to the series at game 5 (through the gamepack that had games 1 through to 5 in it) I find myself playing 3 more than any of the others. Even with expansions 5 is still lacking in the fun area - something that even 4 has more of
HOMM 4 - a lot has changed from the last 3 games, namly units are now made on a daily bases rather than weekly and they can also traverse the game map without a hero. Heros are also present on the battlefield and can be had in groups - not so good for level 1 heros, but great when you have a few high levelers. Things are more pretty, though we have lost a lot of armies and graphics lack that depth that the older 2D had. Its fun, but feels a bit flawed in its mechanics
HOMM 5 - its really pretty to look at and gameplay has returned to similar mechanics found in HOMM3 and before, but its gameplay is slower (generally you might have one or two towns only) and the game can really grate on the player after a short amount of time - it gets boring quick.

I've played 2,3, and 5 (started with 2), and have heard several first-hand accounts from friends I trust about 1 and 4. In my opinion 3 was when the series peaked, and with the two expansions was a damn good game (with some truly excellent user-made maps). HOMM2, while still good, had some unbalanced aspects that 3 fixed up pretty well (speed 6 ranged units, especially titans, were overpowered, and ghosts just completely broke the game; factions were also unbalanced, with knights and barbarians pretty much getting shafted). I passed on HOMM4 based on what I'd heard about it, so I won't comment further on that one. HOMM5 wasn't bad, and incorporated quite a few nice ideas, but for some reason just didn't grab me like HOMM3 did (maybe the pace of it just felt too slow). From what I've heard of the first one it was mostly just a less-refined version of HOMM2 with the highest tier units even more overpowered.

I'm sorry, I have to reply to your crappy grammar. I'm not always the Grammer Nazi (Heil Webster!), but "do they are good" does not make any doggone sense whatsoever. I might be the craziest regular here (or maybe Weclock), but at least I know how to spell.
And yes, I did play 3, 4, and 5.