I'm only going to do this for FMA right now. :/ (May contain spoilers.)
"One True Pairing" Ship: Ed/Rose. Like I've said before, I think it's adorable seeing Ed falling for girls because it brings out the awkward teenager in him. XD; I started liking this pairing after episode 41/42 and then Ed was blushing in 49 and just...agh. People have ridiculed me for it before but I really do think it could work
"Canon" Ship: Ed/Winry. Damn you Kirsten for making me like it. >_>; And now with the manga canon proof I am ADDICTED ARGH. It's almost on even footing with Ed/Rose for me now actually...
"If this happens I'll stab my eyes out with a spork" Ship: Roy/Hughes, Hughes/Roy. Hughes has a FAMILY that he's obsessed over. Roy likes women. They are best friends, and I like best-friendly fluff. That's all there is to it.
"You are one sick bastard" Ship: Elricest. Their love knows no boundaries. I just don't see it as a romantic love. :/ I prefer Gen when it comes to the brothers.
"I dabble a little" 'Ship: Scar/Al. I like it. I just don't find myself daydreaming about it often. ^^;
"It's like a car crash" 'Ship: Anything involving Tucker. EWWWW.
"Tickles my fancy but not sold quite yet" 'Ship: Roy/Riza. Oh, there is definite canon proof alright. And I do think it's cute...but so far I'm more indifferent. :/
"Makes no canon sense but why the hell not" 'Ship: Ban/Winry. HAHAHAH. Winry needs to go through the Gate to Getbackers world or something. XDD
"Everyone else loves it but I just don't feel it" 'Ship: Roy/Ed. Admittedly, I've read/seen fanfiction/fanart where it's been done well and I have liked it, but overall it doesn't seem plausable... >>; I think the anime was pandering to the fans a lot with the subtext.
EDIT: And if anyone wants to hear my opinion on other pairings, ask away~! :D