WOOT :D i prefer like love and happiness in my games and not rape and like stuff.... i also like fantasy themes and mecha themes,
thanks ;D
Hm, then I can recommend you D.C. Da Capo and D.C. Da Capo II, like Zeey said, and maybe you'll like
Fate/stay night too if you like fantasy. F/SN is als listed as the most popular eroge on vndb. In my opinion it's a really good one, without a doubt, but I played better ones, but everyone has other tastes :) It has an english patch too.
About fantasy:
My girlfriend is the president - yeah, this one is really, I don't know what I should say. It's like Snow Sakura, mostly it's funny and then sometimes it get's a little bit emotional. English too.
Hoshizora no Memoria -Wish upon a Shooting Star- - I like that one really much. The true end (Yume's route) is just EPIC ... not so EPIC like in G-Senjou, but it's definitely EPIC. Followed by Kosame's route, which was also really good. Anyway, if you play it, play every single route. First it's required to unlock Yume's route, secondly every route is especially good, also the one from Isuzu, which I didn't like that much. In English.
Princess Waltz - If you like fantasy themes with a very easy card battle system, this one is also worth a try. Didn't like it as much as the others I recommend you here. In english.
Utawarerumono - also like that one. Good story and also with a strategic mini game ... really good. In English.
Cross Channel - played it too. Good story, but somehow it doesn't meet your preferences ... everyone is happy at the end, but you will not. In English.
Dengeki Stryker - same as Cross Channel
Duel Savior - I'm playing this one atm. Only played one route so far. Ok, to be true, I used the skip function. Only played this route because it has an enforced playing order -_- Also a fighting mini game. A really good eroge. The special thing about the english translation is, that you can also play the PS2 version if you downloaded the english patch, since it also was released on PS2 (with other CG's, other voices and some other differents). But even better, if you cleared one route with the PC content (version), it also means it's cleared in PS2 mode. This is good because the PS2 version got an extra route (but no harem route), therefore you can play every route (for example) in PC mode and then the extra route of the PS2 version is unlocked (and the harem route too) :)
About mecha:
Muv-Luv series - unfortunately there are only two translated into English. I didn't play it though, simply because I also like, like you said, love and happiness ... btw, read the tags on the link for further information ;)
Deus Machina Demonbane - is also really good, but yeah, I'm not really into mecha themes, therefore I didn't like it that much, but it's definitely one of the better one's I've played.
And don't worry, everyone of them has good endings afaik and no rape scenes (don't like it too) or death of heroine (if you play with walkthrough and only aim for good endings) ... Muv-Luv and Cross Channel are exceptions and I didn't complete Duel Savior so far, therefore I don't know about the routes yet. :)