It's both a Star Trek and a wider Science Fiction opinion but...
I like humanoid aliens. Sure on occassion Star Trek got pretty lame with them (*cough* Bajorans *cough*) but overall I like the humanoid aliens in Trek and Star Wars (and to be clear I count things like Caitians and Wookies as humanoid)
A lot of people are always calling for more "alien" Aliens, but half of the time those "more alien" aliens just end up being some sort of blob/energy swirl or insects (ooooh so alien, it's definitely not like I can go outside right now and see heaps of insects)
I do like non-humanoid aliens too on occasion, but I think I'll always prefer the humanoid ones.
When it comes down to it, you more or less have two options for how to treat aliens in SF: Either you treat them as characters, or you treat them as a plot device.
There are absolutely proper reasons in a story to treat aliens as a plot device. A lot of first-contact scenario stories fall in this. The point of the aliens in the story is to see how the human characters react and change due to the presence of aliens - or puzzle out establishing communications, or alternatively defeating the bug-eyed monster.
But if you treat aliens as characters, you need to make them relatable in some way. And this is harder in TV/film than in novels. After all, in a novel you can actually have the starfish/spider alien a POV character, and seeing the internal monologue of the alien can make it much easier to relate to them. Even if not, it's much more important for the alien character to think/speak like a human, than to actually look like a human.
But in filmed media, you generally need something which can not only talk/think like a human, but also preferably something which has a face, and can emote. Barring animation, puppetry, or expensive mocap CGI, this likely means human actors with some crap glued to them.