For piano of course classical. Also the songs I make on the piano are classical...Beethoven influences I'd say. But of course my music is not that difficult as Beethoven.
On the guitar...well I often play Iron Maiden, but I can't play the solos for I only play electric guitar since january and tried the winter before some chords with the acoustic guitar but didn't get to anything with it...so seriously playing since January -> no Maiden solos LOL
I also tried a bit Metallica (Seek and Destroy works approximately) and some riffs of Megadeth. like it ^^
The song I made on my own on the guitar rather reminds me a bit of In Flames. So Melodic Death Metal but still I don't play it fast enough, how it should be played, unfortunately. But I think Melodic Death Metal would be my favourite when I can play better.
Well, than techniques...I can't do sweap and I'm not good in tapping and I can't do the harmonics. (Rest of the techniques are okay most of the times) I like these notes between the tune, but I still need to practise to do this on higher tempo. You know what I mean, such things for example (riff from seek and destroy) :
--------------------------------------------------
----------------------------------------------
-----------------------------------------------
--------------------------5------------------------
----5-------7------7-----5-------7-----7-------
-------0-0----0-0----0-----0-0----00----0---------
I don't like too many powerchords in a song...as the punk bands use them...the whole song full of powerchords but I like them if there is a special rhythm like in some parts of hallowed be thy name.
Well, I also like using my left hand fast, because it has something in common with playing piano and I can profit from that. So I think maybe one day fast solos might be possible.
Solos...still Stratovarius - Paradise is one of the only solos I played so far and it's the most difficult so far. There was also Aika Multaa Muistot by Sentenced and The Chair by 69 Eyes and I think Man of Sorrow by Bruce Dickinson, but I didn't try more.
Now Bass Playing...
I hate using chords on the bass (like Steve Harris does) because I don't have the strength to put the fat strings down too long for the powerchords. So most of the times, for example in Fear of the dark, I play:
-----------------------------------------------------------
--------------------------------------------------------
---5---5-5-5-5-5-5-5------------------------------------
---------------------------6-----6-6-6-6-6-6-6-------------
instead of:
---7--------------------------------------------------------
---7-----------------------8------------------------------
---5---5-5-5-5-5-5-5----8--------------------------------
---------------------------6-----6-6-6-6-6-6-6-------------
I also don't appreciate things like these:
----------------------------------------------------
----------------------------------------------------
------7----7----7----7------------------------------
---5----5----5----5--------------------------------
For the same reason as for the powerchords.
What I like is making tiny tunes with the bass, like some little parts in the paradise song:
----------------------------
------------------------------
---------4-4------------------
--2-2-2-----4-4-6----------- or something like that
Or
----------------------------
--------6-----6--8-6-------------
-----8-----8-----------8-----
--6----------------------------- (think it was like this)
And then I like special rhythm types as in "Breath" by Breaking Benjamin (anyone who knows is? ), or a bit in All these things I hate by Bullet for my Valentine. Most of the standard rhythms I don't like that much, this:
(count the -- between to see the rhythm)
2----2----2--2--2----
or
2--2-2-2--2-2-2--2-2-2--2-2-
or even
-2-2-2-2-2-2-2-2-2-2-2-2 etc
It's boring.
Ähm, well this was quite a lot. I don't know if it was of any interest, but it was fun to write it. It's a nice topic.
---------------- edit -----------------------

forgot the singing
I think my voice is best for Bruce Dickinson Style. I tried others, too but this is the one which fits the best. Kotipelto is okay sometimes, but...I like the way to emphasize in Maiden songs more. When singing low it's a bit like HIM-Sentenced-Blaze Bayley-style but not that low LOL for I'm not masculine. But the pronounciation and everything becomes a bit like this, when I sing low. Now, that was it ^^