How many of us genuinely enjoy playing 'evil' characters?

I think it's more so what someone considers "evil" like the example: killing Wrex on Virmire. Personally I don't think this is "evil" given Wrex pulled out a gun and threaten Shep first. I always shoot Wrex every time, and don't feel bad about it. If an NPC threatens my character, there will be consequences. So I would say I play neutral characters because I don't see the "evil" options as being inherently evil. It ultimately depends on perspective.

Occasionally I do. Far less than playing "good" or neutral characters...but I definitely want the option to play as I feel like playing. Sometimes it's just delicious to play a complete villain.

I don't play evil characters, but I do use evil choices when I want to have a morality that isn't extremely binary and is instead tailored more to my character's personality and beliefs, so I like having evil choices (so long as they're not pointlessly evil choices that are over the top. Comical evil choices is different)

Example: So long as you're not meta-gaming, killing Connor can make the most sense if you don't have a mage with you. Even if you've sorted out the trouble at the mage tower, it's still a journey away and you don't know if the demon is going to remain dormant until you get back so you're gambling with the villagers' life to save one life. On one of my playthroughs, my character killed Connor because however much she didn't want to kill a child, she believed she had to because she couldn't endanger so many lives. She prevented Isolde from doing it herself because she thought it might be "eaiser" for Isolde if it was someone else who did it - someone she could even hate for it. I also liked that Alistair was furious with you afterwards (I didn't take the Persuade option because it didn't fit that time)

Example: The Duchess in a Box options are just all great and hilarious. I had an Inquisitor who threw the Grand Duchess Florianne's Pinewood Festival because it was such an eloquent way to send a message that had real bite to it. 

Not me.  Before 2003 I had no problem because most games back then had text instead of spoken dialogue.  But then BioWare in 2003 released Knights of the Old Republic.  It was the first Star Wars game I ever played and I always liked the red beam on Darth Vader's lightsaber.  So I decided to play the game.  I had no trouble being evil.  but then towards the end something happened.  The scene involved the pc, Mission Vao, and Zalbaar and let me just say that scene broke me.  Mission VA did such a good job that I felt terrible afterwards.  For the record I had no problem making the Sandrals and Matale families kill each other and still don't.  But Mission was like a kid sister.  Anyway after I completed that playthrough I replayed lightside for redemption.  Since then any rpg that allows me to be good or evil and has voiced dialogue I always play good.  But there are games that used text for dialogue like Tyranny and I had no problem being evil there.

When I was younger, I enjoyed a lot making a couple of playthroughs being evil, defiling the urn of sacred ashes and killing Leliana and Wynne after it, etc etc

Through the years, I felt more like most of the times they are more comic relief or just marvel supervillains depth levels of it and I simply don't enjoy it. Doesn't make any sense to me at least.

So I stopped doing them, also these days it's not like they give you many options for them.

It's strange no matter my intention to do evil or brutally pragmatic choices in the end i cannot bring myself to do so in the end and choose the good or lawful options.

Yeah, this is me. I (almost) always do one "evil" or "worst-case" playthrough just to see what happens, but even doing that much is always difficult and I feel crappy during/afterwards. It doesn't make much sense when you think about it, because its ultimately just pixels on a screen, no one is being negatively affected by it even in the slightest, so why do we feel bad? Emotions are weird, I guess.

Yeah I pla yboth ways but I would sa yI tend t oplay more good guys than evil ones.

As a general rule unless there is some supernatural backing I don't play evil. In bioware games usually there isn't much in the way of evil options, jerk options a plenty but the truly evil ones are fairly rare. They exist but are rare.