No but seriously, Trying out new builds is perfectly fine. Thats why we have heroes and henchies. So we can do our own thing without bothering anyone else. You know how easily bothered gamers are in general. Overly sensitive and dramatic not to meantion hyper anal about how THEY play and enjoy the game.
That said, when you run a build in a team, it has to benefit the team. Running a self sustaining warrior is ok and can help the monk out. I do the same although I do not use mending or any kind of heal.
I use "Mending Touch" I believe its called, which removed two conditions and heals me for X.
Which no one complains about because it saves the monk energy and in pvp its not very easy to bring me down with conditions. Also locking in conditions with other conditions doesn't work on me unless I'm fighting 2vme and both are spamming conditions. Plus I'v been slain before due to neglectful monks to busy healing the ele's. Then I would die and we would get a party wipe.
Now I'm normally the very last person in a group to die, both in pve and pvp (until the other team catches on and mugs my ass. lol.)
Warriors deal damage, thats what they are made for. They can give as good as they get and thats what you should focus on while in a group. Mending just gets in the way and doesn't benefit the warrior at all.
Hexes and being set on fire defeat mending every single time. Consistant damage defeats mending every time, regardless of max life. Spiking defeats mending every time. Its just not worth it to use mending as a heal. The only thing mending counters is a weak poision condition, and thats rare as people who use poison try to buff it up.
Now, I'm all for finding a build that makes mending good. Mending has the potential to be a benefit to tanking, but you would need a way to increase the life regen greatly. But since tanking is pretty much unneeded in most areas and there are far better ways to tank than trying to regen life quickly, its pointless to bring mending. You'd be better off finding a build for Obsidian Armor or Mist Form or something like that. Endure pain is better than mending.
Anyways. The best thing to do is either (A) find a build you like that others won't hate or (B) find a well known build that you can enjoy.
My axe warrior build is pretty much what I have ran since I started playing guildwars. All energy as I do not like adren much for axes. Over time I'v found the newer skills to be of great help to me. Before wars endurance, energy builds were a pain. Now they are easy.
Power attack, Counter attack, furious axe, executioners strike, warriors endurance, endure pain, mending touch and either rez sig/ rebirth(for heroes) or Lions comfort. (recently traded executioners strike for brawling headbutt for more damage and knockdown)
Is it the best spiker build? Probably not, but it is damn good with healing support. I can do most HM areas with just a monk healing me.
Point is, you have four options. 1.Play whatever you want with heroes and not worry about other players stressing. 2.Play whatever you want in groups and take the chance of them hating it and kicking you. 3.Play whatever the group wants and risk not having fun. 4.Find the middle ground and find a build that people accept that is fun for you.
Also, I welcome the day someone finds the perfect metabuild using mending and everyone says exactly what I opened with. "ZOMG! Mending is teh godlies!" That would give me endless lol's.